-3(10)+9=-21

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Solution for -3(10)+9=-21 equation: 


Simplifying
-3(10) + 9 = -21

Multiply -3 * 10
-30 + 9 = -21

Combine like terms: -30 + 9 = -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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