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-4.2m+19.7+4.2m=-15.3m-18.55
We move all terms to the left:
-4.2m+19.7+4.2m-(-15.3m-18.55)=0
We add all the numbers together, and all the variables
-(-15.3m-18.55)+19.7=0
We get rid of parentheses
15.3m+18.55+19.7=0
We add all the numbers together, and all the variables
15.3m+38.25=0
We move all terms containing m to the left, all other terms to the right
15.3m=-38.25
m=-38.25/15.3
m=-2+4.6363636363636/9.2727272727273
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