5m-1+2m=20

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Solution for 5m-1+2m=20 equation: 


Simplifying
5m + -1 + 2m = 20

Reorder the terms:
-1 + 5m + 2m = 20

Combine like terms: 5m + 2m = 7m
-1 + 7m = 20

Solving
-1 + 7m = 20

Solving for variable 'm'.

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

Add '1' to each side of the equation.
-1 + 1 + 7m = 20 + 1

Combine like terms: -1 + 1 = 0
0 + 7m = 20 + 1
7m = 20 + 1

Combine like terms: 20 + 1 = 21
7m = 21

Divide each side by '7'.
m = 3

Simplifying
m = 3

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