21-3(4-1)=12

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Solution for 21-3(4-1)=12 equation: 


Simplifying
21 + -3(4 + -1) = 12

Combine like terms: 4 + -1 = 3
21 + -3(3) = 12

Multiply -3 * 3
21 + -9 = 12

Combine like terms: 21 + -9 = 12
12 = 12

Add '-12' to each side of the equation.
12 + -12 = 12 + -12

Combine like terms: 12 + -12 = 0
0 = 12 + -12

Combine like terms: 12 + -12 = 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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