To solve the equation x = -9 + 3y for y, we need to isolate y.
Starting with the equation:
x = -9 + 3y
First, we'll move the constant term (-9) to the other side by adding 9 to both sides:
x + 9 = 3y
Now, to isolate y, we divide both sides by 3:
(x + 9) / 3 = y
So, the solution for y is:
y = (x + 9) / 3
