7m-15=8m+20-m

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Solution for 7m-15=8m+20-m equation: 


Simplifying
7m + -15 = 8m + 20 + -1m

Reorder the terms:
-15 + 7m = 8m + 20 + -1m

Reorder the terms:
-15 + 7m = 20 + 8m + -1m

Combine like terms: 8m + -1m = 7m
-15 + 7m = 20 + 7m

Add '-7m' to each side of the equation.
-15 + 7m + -7m = 20 + 7m + -7m

Combine like terms: 7m + -7m = 0
-15 + 0 = 20 + 7m + -7m
-15 = 20 + 7m + -7m

Combine like terms: 7m + -7m = 0
-15 = 20 + 0
-15 = 20

Solving
-15 = 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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