99-M=72

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Solution for 99-M=72 equation: 


Simplifying
99 + -1M = 72

Solving
99 + -1M = 72

Solving for variable 'M'.

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

Add '-99' to each side of the equation.
99 + -99 + -1M = 72 + -99

Combine like terms: 99 + -99 = 0
0 + -1M = 72 + -99
-1M = 72 + -99

Combine like terms: 72 + -99 = -27
-1M = -27

Divide each side by '-1'.
M = 27

Simplifying
M = 27

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