Question

I need help with variables on both sides. If you could show me how to do it without telling me the answer that would be great. 7r - 7 = 2r + 18

Answer 1

Start by adding together like terms. Pick either the numbers or the variables to add/subtract from one side. Do the same to both sides.

Ex. 80 + 9x= 90+ 7x
I want to subtract eighty--->9x=10+7x

Answer 2

Does this make sense?

Answer 3

Then....you have 9x=10+7x. In this case, your like terms are the variables. So you should subtract 7x from both sides to get 2x= 10.

9x-7x=10+7x-7x
2x=10

Now to solve for x, you divide out the two.
2x/2=10/2
x=5

Can you do this with your equation?

Answer 4

Ok. Thanks that helps.