2.8m+21=2.2m+18

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Solution for 2.8m+21=2.2m+18 equation: 



2.8m+21=2.2m+18

We move all terms to the left:

2.8m+21-(2.2m+18)=0

We get rid of parentheses

2.8m-2.2m-18+21=0

We add all the numbers together, and all the variables

0.6m+3=0

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

0.6m=-3

m=-3/0.6

m=-5

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