2m-9=20

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Solution for 2m-9=20 equation: 


Simplifying
2m + -9 = 20

Reorder the terms:
-9 + 2m = 20

Solving
-9 + 2m = 20

Solving for variable 'm'.

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

Add '9' to each side of the equation.
-9 + 9 + 2m = 20 + 9

Combine like terms: -9 + 9 = 0
0 + 2m = 20 + 9
2m = 20 + 9

Combine like terms: 20 + 9 = 29
2m = 29

Divide each side by '2'.
m = 14.5

Simplifying
m = 14.5

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