M-4=-7-8

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Solution for M-4=-7-8 equation: 


Simplifying
M + -4 = -7 + -8

Reorder the terms:
-4 + M = -7 + -8

Combine like terms: -7 + -8 = -15
-4 + M = -15

Solving
-4 + M = -15

Solving for variable 'M'.

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

Add '4' to each side of the equation.
-4 + 4 + M = -15 + 4

Combine like terms: -4 + 4 = 0
0 + M = -15 + 4
M = -15 + 4

Combine like terms: -15 + 4 = -11
M = -11

Simplifying
M = -11

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