M+3=-15

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Solution for M+3=-15 equation: 


Simplifying
M + 3 = -15

Reorder the terms:
3 + M = -15

Solving
3 + M = -15

Solving for variable 'M'.

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

Add '-3' to each side of the equation.
3 + -3 + M = -15 + -3

Combine like terms: 3 + -3 = 0
0 + M = -15 + -3
M = -15 + -3

Combine like terms: -15 + -3 = -18
M = -18

Simplifying
M = -18

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