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-20-20-m=13m+20
We move all terms to the left:
-20-20-m-(13m+20)=0
We add all the numbers together, and all the variables
-1m-(13m+20)-40=0
We get rid of parentheses
-1m-13m-20-40=0
We add all the numbers together, and all the variables
-14m-60=0
We move all terms containing m to the left, all other terms to the right
-14m=60
m=60/-14
m=-4+2/7
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