M+21=5

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Solution for M+21=5 equation: 


Simplifying
M + 21 = 5

Reorder the terms:
21 + M = 5

Solving
21 + M = 5

Solving for variable 'M'.

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

Add '-21' to each side of the equation.
21 + -21 + M = 5 + -21

Combine like terms: 21 + -21 = 0
0 + M = 5 + -21
M = 5 + -21

Combine like terms: 5 + -21 = -16
M = -16

Simplifying
M = -16

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