7[2.5+3(12-7)]=

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Solution for 7[2.5+3(12-7)]= equation: 


Simplifying
7[2.5 + 3(12 + -7)] = 0

Combine like terms: 12 + -7 = 5
7[2.5 + 3(5)] = 0

Multiply 3 * 5
7[2.5 + 15] = 0

Combine like terms: 2.5 + 15 = 17.5
7[17.5] = 0

Multiply 7 * 17.5
122.5 = 0

Solving
122.5 = 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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