12+3(2(4)-5)=21

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Solution for 12+3(2(4)-5)=21 equation: 


Simplifying
12 + 3(2(4) + -5) = 21

Multiply 2 * 4
12 + 3(8 + -5) = 21

Combine like terms: 8 + -5 = 3
12 + 3(3) = 21

Multiply 3 * 3
12 + 9 = 21

Combine like terms: 12 + 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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