M-15-21=-55

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Solution for M-15-21=-55 equation: 


Simplifying
M + -15 + -21 = -55

Reorder the terms:
-15 + -21 + M = -55

Combine like terms: -15 + -21 = -36
-36 + M = -55

Solving
-36 + M = -55

Solving for variable 'M'.

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

Add '36' to each side of the equation.
-36 + 36 + M = -55 + 36

Combine like terms: -36 + 36 = 0
0 + M = -55 + 36
M = -55 + 36

Combine like terms: -55 + 36 = -19
M = -19

Simplifying
M = -19

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