10-2m=40

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Solution for 10-2m=40 equation: 


Simplifying
10 + -2m = 40

Solving
10 + -2m = 40

Solving for variable 'm'.

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

Add '-10' to each side of the equation.
10 + -10 + -2m = 40 + -10

Combine like terms: 10 + -10 = 0
0 + -2m = 40 + -10
-2m = 40 + -10

Combine like terms: 40 + -10 = 30
-2m = 30

Divide each side by '-2'.
m = -15

Simplifying
m = -15

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