- anonymous

-4x+3=6x-7...x=-2??? Can someone c if this the right answer

- jamiebookeater

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- anonymous

x=-1

- anonymous

You ned to get rid of the -4x first by adding 4x to both sides.

- anonymous

3 = 10x - 7

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## More answers

- anonymous

add 7 to both sides

- anonymous

10 = 10x

- anonymous

divide both sides by 10

- anonymous

x = 1

- anonymous

so i get rid of the - sign in front of the -4x and just add it to the 6x

- anonymous

Yes you get rid of the -4x by +4x to both sides.
I get rid of the -4x because it is smaller than 6x...

- anonymous

ok cuz i used-4 + 6x and got -2x im lost

- anonymous

To get rid of let's say +5 you would -5 because that would give you 0
To get rid of -3 you + 3 because that would give you 0
To get rid of +7x you -7x because that would give you 0
To get rid of -4x you +4x because that would give you 0
Does that help?

- anonymous

actually since u explained it like that yes it does......sry if im being high maintenance hate not understanding my teacher sucks at his job

- anonymous

x/-7-9 =-3......the / means divide so i need to multiply?

- anonymous

OK.. You only have an x on one side so you need to get the x by itself. You always add or subtract first if needed. So you need to get rid of the -9 first

- anonymous

x/-7=-12?

- anonymous

To get rid of -9 you need to +9
-3 + 9 = 6
so x/-7 = 6
Do you understand?

- anonymous

not really.....

- anonymous

When it says to solve.. The first thing you should do is go to the side with the "x".. If both sides of the = sign have an "x" then you get rid of the smallest "x" by either adding or subtracting the "x". you do the opposite, if it is a positive "x" then you subtract. if it is a negative "x" then you add..
In this case, you only have x on one side. Do you know how to do this problem.
x + 3 = 10

- anonymous

x=7

- anonymous

Without actually just figuring that out... do you know what to do algebraically?

- anonymous

yes subtract 3 from both sides

- anonymous

Good!!!
Look at the problem we are doing and pretend the -7 is not there... we would have
x - 9 = -3
How would you solve this?

- anonymous

add 9 to both sides

- anonymous

Good.. That is what you do first on this problem.
NOw..
How would you solve 2x = 10 (algebraically)

- anonymous

divide 10 by 2 since 2x is multiplying u need to divide

- anonymous

Great..
So let's do our problem...
x/-7 - 9 = -3 You add 9 to both sides
x/-7 = 6 then to get rid of "divide by -7" you
multiply by -7 .. put a (-7) to the
left of the x and to the right of
the 6
(-7) x = 6 (-7)
-----
-7

- anonymous

the -7's cancel and you get
x = -42

- anonymous

making sense so if x/-6=-4 can i use the the -4 or the -6? sry if stupid ?

- anonymous

You always go to the side with the x... don't even look at the other side.
So all you see is x/-6
What would you do then?

- anonymous

add 6 so x=2

- anonymous

Read this to yourself x/-6
Did you say x divided by -6?

- anonymous

yes

- anonymous

So to get rid of divided by -6 you should multiply by -6.
(-6)x -4(-6)
----- =
-6
The -6's cancel and you get
x = 24

- anonymous

wow im retarded got frazzled since there was only 2 numbers.......

- anonymous

Do you have another problem?

- anonymous

im sure i will got like 20 left for homework will u b on for a while

- anonymous

Sure if you want me to help you.

- anonymous

thank u so much for taking time and being paitent

- anonymous

real quick lol 3x+5=4x+16......x=3 or -11=x

- anonymous

x = -11
3x + 5 = 4x + 16 get rid of your smallest x (3x) by
subtracting 3x from both sides
5 = x + 16 subtract 16 from both sides
-11 = x
x = -11

- anonymous

thats what i got my friend and i were in a debate

- anonymous

thx again

- anonymous

do u know how to use a algebraic calculator

- anonymous

Probably.. what do you need to know

- anonymous

trying to check my work not sure how to enter the equation my friend gave me a ti 30xa

- anonymous

You mean of the problem we just did?
Just type 3(-11) + 5 =
You should see -28
Now type 4(-11)+16 =
You should see -28
That means you were correct

- anonymous

dont i need to put x in the equation

- anonymous

No ... you put in what you got for x... in the last problem it was -11

- anonymous

ok -2(3x+1)=3x-20......can we do together?

- anonymous

Yes. When you have parentheses, you need to get rid of them first... you do this by distributive method.. can you do this?

- anonymous

yes -6x + -2=3x-20....first step

- anonymous

Good... It's best not to have a + next to a -
Just write -2 * 3x = -6x
and -2* 1 = -2
So we write -6x - 2 = 3x - 20
NOW you have x's on both sides - so get rid of the smallest x.

- anonymous

so y do we change from adding to subtracting

- anonymous

WOW.. hard to explain... Were you ever taught that when you were given a "- 5" you could change that into a "+ a negative"

- anonymous

Plus a negative 2 (+ -2)
is the same thing as subtracting 2 (-2)

- anonymous

You just never want two signs next to each other...
So going back to the problem
-2(3x + 1) you should think of this.
-2(3x) and -2(+1) so you get -6x -2
**** THE SIGN IN FRONT OF A NUMBER ALWAYS GOES WITH THAT NUMBER... it's like it belongs to that number.

- anonymous

We can do it your way... here we go
-6x + -2 = 3x - 20
How do we get x's on one side (get rid of the smallest "x")

- anonymous

ur way makes alot more sense here we go

- anonymous

just to make sure if i use the smaller x it would be 9x?

- anonymous

very good
-2 = 9x - 20
NOW that you have x on one side ONLY LOOK AT THE side with the x... What do you get rid of next.

- anonymous

or - 3x

- anonymous

To get rid of the -6x you need to +6x to both sides.

- anonymous

add 20 or 2 to both sides get -18.....-18/9x= x=-2?

- anonymous

Very important you understand what I am saying.
When there is only one x in your problem. You go to the side of the equal sign that has the x. YOUR EYES SHOULD NOT EVEN SEE THE OTHER SIDE OF THE = sign. In this case.. take your left hand and cover up the -2.
Your eyes should ONLY see 9x - 20 and in this case you do + 20 to both sides.

- anonymous

okok i knew that trying to rush so im not holding u up......x=2

- anonymous

Yes...

- anonymous

thx again whats ur name im keith

- anonymous

Andrea

- anonymous

andrea i cant thk u enough

- anonymous

Do you have another problem? By the way, if you ever need help after tonight.. I would be glad to help you.. you can email me at amcbeth328@gmail.com

- anonymous

4(3x-5)=-4x+27 that equals 12x-20=-4x+27, so would it b 12x - -4x or 12x-4x?

- anonymous

12x - 20 = -4x + 27
You have x's on both sides of the = sign.. get rid of the smallest x by doing the opposite.

- anonymous

just wanted to know if next step = 8x or 16x

- anonymous

-4x is smaller than 12x so you get rid of the
-4x by +4x to both sides
16x - 20 = 27

- anonymous

then add 20 to both

- anonymous

Yes and you won't get a nice answer

- anonymous

16x = 47 divide by 16
x = 2.9 or 47/16 which = 2 15/16

- anonymous

Any more?

- anonymous

7(4-x)+3=17......x=-2?

- anonymous

28 - 7x + 3 = 17
-7x + 31 = 17
-7x = -14
x = 2
Almost.. how do we differ

- anonymous

i meant x=2 my brain is fried forgot when u divide 2 negatives u get positive

- anonymous

Any more? I am getting tired and need to get to bed. I have to be to school early tomorrow. But if we are close, I will hang in there.

- anonymous

no im good thk u very much

- anonymous

OK Keith.. keep working hard... it will pay off for you in the long run... I could see a lot of improvement with your math tonight.
Have a good week at school.

- anonymous

u too

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