Answer:
x = y - 4
Explanation:
"Solve for x" means to get the x all by itself on one side of the equation.
We start with:
y = x + 4
Subtract 4 from both sides of the equation.
y - 4 = x
This is the same as
x = y - 4
Now it is "solved for x" because the equation shows what x is equal to.