M+87=13

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Solution for M+87=13 equation: 


Simplifying
M + 87 = 13

Reorder the terms:
87 + M = 13

Solving
87 + M = 13

Solving for variable 'M'.

Move all terms containing M to the left, all other terms to the right.

Add '-87' to each side of the equation.
87 + -87 + M = 13 + -87

Combine like terms: 87 + -87 = 0
0 + M = 13 + -87
M = 13 + -87

Combine like terms: 13 + -87 = -74
M = -74

Simplifying
M = -74

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