-3=y+x

Solution for -3=y+x equation:

Simplifying
-3 = y + x

Reorder the terms:
-3 = x + y

Solving
-3 = x + y

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '-1x' to each side of the equation.
-3 + -1x = x + -1x + y

Combine like terms: x + -1x = 0
-3 + -1x = 0 + y
-3 + -1x = y

Add '3' to each side of the equation.
-3 + 3 + -1x = 3 + y

Combine like terms: -3 + 3 = 0
0 + -1x = 3 + y
-1x = 3 + y

Divide each side by '-1'.
x = -3 + -1y

Simplifying
x = -3 + -1y