-9-(-15)=X

Solution for -9-(-15)=X equation:

Simplifying
-9 + -1(-15) = X

Multiply -1 * -15
-9 + 15 = X

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

Solving
6 = 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.
6 + -1X = X + -1X

Combine like terms: X + -1X = 0
6 + -1X = 0

Add '-6' to each side of the equation.
6 + -6 + -1X = 0 + -6

Combine like terms: 6 + -6 = 0
0 + -1X = 0 + -6
-1X = 0 + -6

Combine like terms: 0 + -6 = -6
-1X = -6

Divide each side by '-1'.
X = 6

Simplifying
X = 6