125-86=x

Solution for 125-86=x equation:

Simplifying
125 + -86 = x

Combine like terms: 125 + -86 = 39
39 = x

Solving
39 = 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.
39 + -1x = x + -1x

Combine like terms: x + -1x = 0
39 + -1x = 0

Add '-39' to each side of the equation.
39 + -39 + -1x = 0 + -39

Combine like terms: 39 + -39 = 0
0 + -1x = 0 + -39
-1x = 0 + -39

Combine like terms: 0 + -39 = -39
-1x = -39

Divide each side by '-1'.
x = 39

Simplifying
x = 39