2m-3-3m=20-m

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Solution for 2m-3-3m=20-m equation: 


Simplifying
2m + -3 + -3m = 20 + -1m

Reorder the terms:
-3 + 2m + -3m = 20 + -1m

Combine like terms: 2m + -3m = -1m
-3 + -1m = 20 + -1m

Add 'm' to each side of the equation.
-3 + -1m + m = 20 + -1m + m

Combine like terms: -1m + m = 0
-3 + 0 = 20 + -1m + m
-3 = 20 + -1m + m

Combine like terms: -1m + m = 0
-3 = 20 + 0
-3 = 20

Solving
-3 = 20

Couldn't find a variable to solve for.

This equation is invalid, the left and right sides are not equal, therefore there is no solution.

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