help me solve some equation

- CountryBoy15

help me solve some equation

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- CountryBoy15

1.x – 6 = 8
2.y + 5 = –12
3. -2c= –18

- sophiaholder

Okay so giving you the answer wouldn't help. You need to know how to do it.

- CountryBoy15

i know thats why i asked help not tell

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- sophiaholder

Okay let me help.

- CountryBoy15

ty and whos the mod here

- sophiaholder

My computer crashed sorry. Okay so for each equation, to solve for x you want to get it by itself.

- sophiaholder

To do that, you need to remove the numbers on the side of the equation x is at.

- CountryBoy15

ok

- sophiaholder

For the first one, how would you get -6 to equal 0?

- sophiaholder

Any idea?

- CountryBoy15

nope

- sophiaholder

Okay so to get rid of negative numbers, you need to add a positive number to it.

- sophiaholder

-6 + 6 = 0

- sophiaholder

After you add that to the side of the equation x is on, you have to add it to the other side.

- CountryBoy15

so it would be x=6

- sophiaholder

So, x-6 = 8
+6 +6

- CountryBoy15

so x=2

- sophiaholder

No, 6+8

- CountryBoy15

wait no i got it x=14 ok

- sophiaholder

Yep!

- sophiaholder

Now try to do the second one.

- CountryBoy15

yeah so the same for the others????\

- sophiaholder

Sorta.

- sophiaholder

if you have a positive number that you need to get rid of, you need to subtract.

- CountryBoy15

would it be y=-7

- sophiaholder

Close! If you are subtracting from a negative number, you need to add

- CountryBoy15

or did i mis a step

- sophiaholder

So -12 - 5 = -17

- sophiaholder

Do you understand?

- CountryBoy15

ok so then y=-17

- sophiaholder

Yep!

- sophiaholder

Now can you do the last one?

- CountryBoy15

what about this fractoin thisng its 1/4 a=3

- sophiaholder

It is VERY different for the last one.

- sophiaholder

Annoying I know, but when you have 3x that means it is 3*x right?

- CountryBoy15

can you help me with this one then ill do the last one 1/4 a=3

- sophiaholder

*=multiply

- CountryBoy15

right

- sophiaholder

okay well to do that one, 1/4 * a = 3

- sophiaholder

We can do two things here.

- CountryBoy15

so it would be a=12

- sophiaholder

YES!

- sophiaholder

Good job!

- CountryBoy15

ok well thats easy

- sophiaholder

So what do you do for the last one?

- sophiaholder

If it is multiplication, use division

- CountryBoy15

ok l3ets see

- sophiaholder

Keep the c alone and focus on the 3

- CountryBoy15

so would it be c=-36
jw

- sophiaholder

Okay, so no. If we have multiplication, we need to use division to get rid of the 3

- sophiaholder

or 2

- CountryBoy15

no wait it would be c=-9 right

- sophiaholder

Yep. Except remember that a negative/negative = positive

- sophiaholder

So it would be 9

- CountryBoy15

so it would be c=9 then right

- sophiaholder

Yep!

- CountryBoy15

and can you help with 2 or 3 more thats all

- CountryBoy15

heres the first 6.5 = –3 + n

- sophiaholder

Of course!

- sophiaholder

OKay so what do you think we would do first?

- CountryBoy15

um lets see

- CountryBoy15

-3 make it 3
maybe

- sophiaholder

Add 3 to both sides to get rid of -3. :)

- CountryBoy15

so would be n=9.5 right??

- sophiaholder

Yep!

- CountryBoy15

ok ty now 2 more please

- CountryBoy15

then theres this 2/3x=6

- sophiaholder

ok so what do you think we should do first. Hint: We will need to use multiplication and division for this one

- CountryBoy15

sry crashed and um maybe divison

- sophiaholder

Nope. IF we have a fraction beside the variable we need to get rid of the denominator.

- sophiaholder

To cancel out division, you need to use multiplication.

- CountryBoy15

oh so how would it be like??

- sophiaholder

So, to get rid of 3 we need to multiply by 3 on both sides.

- CountryBoy15

would it be x=9

- sophiaholder

Yes!! Good job!

- CountryBoy15

yes ty one more and again ty now i get it a lil more bc im home schooled and never get it thanks

- sophiaholder

I'm homeschooled as well, so I understand.

- CountryBoy15

x/4=12/6

- CountryBoy15

thats awesome thanks for the help

- sophiaholder

Okay so on this one I would simplify first.

- sophiaholder

12/6 is...?

- CountryBoy15

2??

- sophiaholder

Yeah lol.

- sophiaholder

I just realized that was probably a stupid question I apologize.

- CountryBoy15

so would be x=8

- sophiaholder

Yep!

- sophiaholder

If you ever need anymore help, feel free to tag me if I am online.

- CountryBoy15

lol thanks wish i could give more then one medal

- sophiaholder

Algebra is one of my favorite subjects.

- CountryBoy15

ok i will thanks

- sophiaholder

And here is a medal for getting those last ones on your own!

- CountryBoy15

oh ty so much have a great one thanks

- sophiaholder

No problem! You too!

- CountryBoy15

yeah would have mostliky asked someone to give lol

- sophiaholder

lol

- CountryBoy15

heres a word Q u think u could help

- CountryBoy15

@sophiaholder

- CountryBoy15

You need to make 18 cupcakes for a birthday party. You have already made 11. How many more cupcakes do you need to make? Write an equation and solve.

- CountryBoy15

@whovianchick help please i think its 7 more they have to make idk

- CountryBoy15

nvm i was right have a good one

- sophiaholder

Sorry! Glad you got it yourself though!

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