7m-9m+m=40

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Solution for 7m-9m+m=40 equation: 


Simplifying
7m + -9m + m = 40

Combine like terms: 7m + -9m = -2m
-2m + m = 40

Combine like terms: -2m + m = -1m
-1m = 40

Solving
-1m = 40

Solving for variable 'm'.

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

Divide each side by '-1'.
m = -40

Simplifying
m = -40

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