Solve for y, y+3x=8x-7

Question

You have to solve for y, but the problem is I don't get how to solve for it if we don't have x.  Will y equal to something that has x included for the answer.

Answer 1

y+3x=8x-7

 

Subtract 3x from both sides:

y = 5x - 7

 

Now you know the relationship between x and y, but you don't know the value of either.

 

If you are given the value of one of the variables you can solve for the value of the other.