-3(-1-1)+9=15

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Solution for -3(-1-1)+9=15 equation: 


Simplifying
-3(-1 + -1) + 9 = 15

Combine like terms: -1 + -1 = -2
-3(-2) + 9 = 15

Multiply -3 * -2
6 + 9 = 15

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

Add '-15' to each side of the equation.
15 + -15 = 15 + -15

Combine like terms: 15 + -15 = 0
0 = 15 + -15

Combine like terms: 15 + -15 = 0
0 = 0

Solving
0 = 0

Couldn't find a variable to solve for.

This equation is an identity, all real numbers are solutions.

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