M+18=-3

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Solution for M+18=-3 equation: 


Simplifying
M + 18 = -3

Reorder the terms:
18 + M = -3

Solving
18 + M = -3

Solving for variable 'M'.

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

Add '-18' to each side of the equation.
18 + -18 + M = -3 + -18

Combine like terms: 18 + -18 = 0
0 + M = -3 + -18
M = -3 + -18

Combine like terms: -3 + -18 = -21
M = -21

Simplifying
M = -21

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