2(-1-8)+3*-1=-21

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Solution for 2(-1-8)+3*-1=-21 equation: 


Simplifying
2(-1 + -8) + 3 * -1 = -21

Combine like terms: -1 + -8 = -9
2(-9) + 3 * -1 = -21

Multiply 2 * -9
-18 + 3 * -1 = -21

Multiply 3 * -1
-18 + -3 = -21

Combine like terms: -18 + -3 = -21
-21 = -21

Add '21' to each side of the equation.
-21 + 21 = -21 + 21

Combine like terms: -21 + 21 = 0
0 = -21 + 21

Combine like terms: -21 + 21 = 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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