Question

What is the x-value of the solution?
-x + 2y = 6
6y = x + 18

Answer 1

\(-x+2y=6\) can be rewritten as \(x=2y-6\)

Answer 2

take the \(x\) in the second equation and replace it by \(2y-6\) to get
\[6y=2y-6+18\] or
\[6y=2y+12\] then you can solve for \(y\) in two steps