Question

How do you solve for y given `x+y=9`?

Answer 1

See the entire solution process below:

Explanation:

Subtract `color(red)(x)` from each side of the equation to solve for `y` while keeping the equation balanced:

`-color(red)(x) + x + y = -color(red)(x) + 9`

`0 + y = -x + 9`

`y = -x + 9`