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30=7m+2
We move all terms to the left:
30-(7m+2)=0
We get rid of parentheses
-7m-2+30=0
We add all the numbers together, and all the variables
-7m+28=0
We move all terms containing m to the left, all other terms to the right
-7m=-28
m=-28/-7
m=+4
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