3[21-(5+8)]=

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


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

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

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

Combine like terms: 21 + -13 = 8
3[8] = 0

Multiply 3 * 8
24 = 0

Solving
24 = 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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