anonymous
  • anonymous
solve. please show me how you got this.... I am so lost I need step by step help! -15 (3 + x) = -6x -9
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
How far did you get?
anonymous
  • anonymous
ok first you are goign to distribute the -15 into (3+x) and end up with -45-15 x=-6x-9
anonymous
  • anonymous
Now we want to get all veribles and constants on oppist sides

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anonymous
  • anonymous
and you end up with 9-45=15x-9x
anonymous
  • anonymous
simplify you get -36=6x and because we are solving for x we will divide -36 by 6 and end up with x=-6
anonymous
  • anonymous
I started with -15 * 3 and then -15 * x to get rid of ( ) Thank you so much.... I have a few more probs I am stuck on too if your free....
anonymous
  • anonymous
I had it started right but didn't know what to do next. That is my problem every time.
anonymous
  • anonymous
Sure ask away
anonymous
  • anonymous
2 ( 7x + 5) = 3x -11 (2 - x)
anonymous
  • anonymous
ok remember first you want to distribute the 2 into (7x+5) and the -11 into the (2-x)
anonymous
  • anonymous
I got to 14x + 10 = 3x -22 - 11x
anonymous
  • anonymous
Perfect. Now just get all your x terms on one side, and the non-x terms on the other.
anonymous
  • anonymous
ok move your simplify both sides
anonymous
  • anonymous
Oh, except when you multipied the -11 to the -1 it should have be a +11x
anonymous
  • anonymous
err -11 to the -x rather
anonymous
  • anonymous
No, the 11 wasn't distributed correctly, the right side should be 3x -22 + 11x.
anonymous
  • anonymous
so its -11 times - x ??
anonymous
  • anonymous
Yes.
anonymous
  • anonymous
You get 14x + 10 = 14x - 22, if you subtract 14x from each side you get 10 = -22, which is false.
anonymous
  • anonymous
-11(2-x) = -11(2) + (-11)(-x)
anonymous
  • anonymous
anyone still here?
anonymous
  • anonymous
I can give it a go
anonymous
  • anonymous
2 ( 7x + 5) = 3x -11 (2 - x)
anonymous
  • anonymous
ok the first thing you want to do is to distribute the 2 through (7x+5)
anonymous
  • anonymous
I think I got it all the way until 14x + 10 = 3x -22 + 11
anonymous
  • anonymous
You mean 11x. There's an x there too, but everything else is correct
anonymous
  • anonymous
put an x on your +11
anonymous
  • anonymous
yes sorry
anonymous
  • anonymous
now bring the 3x over with the 11x and your number terms to the other side
anonymous
  • anonymous
then simplify both sides transpose your varibles and constansts and simplify again
anonymous
  • anonymous
what @ the 14 x on the left?
anonymous
  • anonymous
when you move things from one side to another, you have to first change the sign of the thing you're moving. the 3x will become negative
anonymous
  • anonymous
so 14x - 3x + 10 on the left?
anonymous
  • anonymous
yep. Now you can take the 10 over to the other side in the same way. change the sign, and then you can switch it over to the other side. from there, just add stuff and let me know what you get
anonymous
  • anonymous
11x=-32 + 11x
anonymous
  • anonymous
now -11 from both sides?
anonymous
  • anonymous
yes
anonymous
  • anonymous
how can I subtract 11x from 11 I thought you could only do like terms?
anonymous
  • anonymous
you meant to write 11x, remember? now you can subtract 11x from it
anonymous
  • anonymous
11x - 11x ??
anonymous
  • anonymous
Yea. the 11x-11x will cancel, leaving you with a false statement
anonymous
  • anonymous
Yea it's a false statement, kinda a trick problem
anonymous
  • anonymous
k how @ -10 - 3/7 x = 5
anonymous
  • anonymous
Start out the same way getting your varibles and constansts on different sides
anonymous
  • anonymous
you end up with -3/7x=15
anonymous
  • anonymous
Have you been taught how to cancel out a fraction?
anonymous
  • anonymous
I don't know all these rules and when to use them confuse me very BAD!!
anonymous
  • anonymous
if you move something to one side of the = sign,do you have to move something back over to replace it?
anonymous
  • anonymous
Inorder to cancel out the fraction we are going to multiply 7*-3 then divide by 7 which will leave us with -3x=15*7, which is -3x=105, now divide both sides by -3 and we end up with x=-35
anonymous
  • anonymous
No just remember whatever you do to one side you have to do to the other.
anonymous
  • anonymous
so if we have something like 2+x=1 we are going to subtract both sides by 2 which will give us an answer of x=-1
anonymous
  • anonymous
k that makes sense
anonymous
  • anonymous
so does -4/13 x = -20 come out to be.... x = -65 ???
anonymous
  • anonymous
But like we did above we want to cancel out the fraction so we first need to find a lcm for the equation. This is easy to do because we only have one fraction in the problem. So we first multiply the numerator times the lcm then divide the new numerator by the lcm
anonymous
  • anonymous
but we have to also multiply the other side by the lcm
anonymous
  • anonymous
I just realized that can't be right.... it would have to be a positive number wouldn't it?
anonymous
  • anonymous
correct it would be x=65
anonymous
  • anonymous
okay.... YAY!!!
anonymous
  • anonymous
how @ x - 4/11 = 3/5 would it be x = 53/55
anonymous
  • anonymous
or x = 3/5 ??
anonymous
  • anonymous
53/55 i think.....
anonymous
  • anonymous
i agree
anonymous
  • anonymous
okay you are ahuge help. Thank you...
anonymous
  • anonymous
No problem best of luck to you
anonymous
  • anonymous
you know anything @ set builder notation???
anonymous
  • anonymous
Yes
anonymous
  • anonymous
what would -5x -4 < 3 ( x - 3) be in set builder notation?
anonymous
  • anonymous
First distribute your 3 like you were before. You want to get some expression for x either greater or less than something else.
anonymous
  • anonymous
brb, in a few mins
anonymous
  • anonymous
Ok, back sorry. Did you distribute the 3?

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