-40-31=x

Solution for -40-31=x equation:

Simplifying
-40 + -31 = x

Combine like terms: -40 + -31 = -71
-71 = x

Solving
-71 = x

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.
-71 + -1x = x + -1x

Combine like terms: x + -1x = 0
-71 + -1x = 0

Add '71' to each side of the equation.
-71 + 71 + -1x = 0 + 71

Combine like terms: -71 + 71 = 0
0 + -1x = 0 + 71
-1x = 0 + 71

Combine like terms: 0 + 71 = 71
-1x = 71

Divide each side by '-1'.
x = -71

Simplifying
x = -71