-6+15=x

Solution for -6+15=x equation:

Simplifying
-6 + 15 = x

Combine like terms: -6 + 15 = 9
9 = x

Solving
9 = 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.
9 + -1x = x + -1x

Combine like terms: x + -1x = 0
9 + -1x = 0

Add '-9' to each side of the equation.
9 + -9 + -1x = 0 + -9

Combine like terms: 9 + -9 = 0
0 + -1x = 0 + -9
-1x = 0 + -9

Combine like terms: 0 + -9 = -9
-1x = -9

Divide each side by '-1'.
x = 9

Simplifying
x = 9