128.5=20+15.5m

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Solution for 128.5=20+15.5m equation: 



128.5=20+15.5m

We move all terms to the left:

128.5-(20+15.5m)=0

We add all the numbers together, and all the variables

-(15.5m+20)+128.5=0

We get rid of parentheses

-15.5m-20+128.5=0

We add all the numbers together, and all the variables

-15.5m+108.5=0

We move all terms containing m to the left, all other terms to the right

-15.5m=-108.5

m=-108.5/-15.5

m=+7

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