45-(-86)=z

Solution for 45-(-86)=z equation:

Simplifying
45 + -1(-86) = z

Multiply -1 * -86
45 + 86 = z

Combine like terms: 45 + 86 = 131
131 = z

Solving
131 = z

Solving for variable 'z'.

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

Add '-1z' to each side of the equation.
131 + -1z = z + -1z

Combine like terms: z + -1z = 0
131 + -1z = 0

Add '-131' to each side of the equation.
131 + -131 + -1z = 0 + -131

Combine like terms: 131 + -131 = 0
0 + -1z = 0 + -131
-1z = 0 + -131

Combine like terms: 0 + -131 = -131
-1z = -131

Divide each side by '-1'.
z = 131

Simplifying
z = 131