M+20=15

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Solution for M+20=15 equation: 


Simplifying
M + 20 = 15

Reorder the terms:
20 + M = 15

Solving
20 + M = 15

Solving for variable 'M'.

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

Add '-20' to each side of the equation.
20 + -20 + M = 15 + -20

Combine like terms: 20 + -20 = 0
0 + M = 15 + -20
M = 15 + -20

Combine like terms: 15 + -20 = -5
M = -5

Simplifying
M = -5

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