21+3[20-(8+5)]=

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Solution for 21+3[20-(8+5)]= equation: 


Simplifying
21 + 3[20 + -1(8 + 5)] = 0

Combine like terms: 8 + 5 = 13
21 + 3[20 + -1(13)] = 0

Multiply -1 * 13
21 + 3[20 + -13] = 0

Combine like terms: 20 + -13 = 7
21 + 3[7] = 0

Multiply 3 * 7
21 + 21 = 0

Combine like terms: 21 + 21 = 42
42 = 0

Solving
42 = 0

Couldn't find a variable to solve for.

This equation is invalid, the left and right sides are not equal, therefore there is no solution.

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