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250+130m=125+155m
We move all terms to the left:
250+130m-(125+155m)=0
We add all the numbers together, and all the variables
130m-(155m+125)+250=0
We get rid of parentheses
130m-155m-125+250=0
We add all the numbers together, and all the variables
-25m+125=0
We move all terms containing m to the left, all other terms to the right
-25m=-125
m=-125/-25
m=+5
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