[-15+13]=x

Solution for [-15+13]=x equation:

Simplifying
[-15 + 13] = x

Combine like terms: -15 + 13 = -2
[-2] = x
-2 = x

Solving
-2 = 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.
-2 + -1x = x + -1x

Combine like terms: x + -1x = 0
-2 + -1x = 0

Add '2' to each side of the equation.
-2 + 2 + -1x = 0 + 2

Combine like terms: -2 + 2 = 0
0 + -1x = 0 + 2
-1x = 0 + 2

Combine like terms: 0 + 2 = 2
-1x = 2

Divide each side by '-1'.
x = -2

Simplifying
x = -2