42+12-8=100

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Solution for 42+12-8=100 equation: 


Simplifying
42 + 12 + -8 = 100

Combine like terms: 42 + 12 = 54
54 + -8 = 100

Combine like terms: 54 + -8 = 46
46 = 100

Solving
46 = 100

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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