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-8m+3=-4m+19
We move all terms to the left:
-8m+3-(-4m+19)=0
We get rid of parentheses
-8m+4m-19+3=0
We add all the numbers together, and all the variables
-4m-16=0
We move all terms containing m to the left, all other terms to the right
-4m=16
m=16/-4
m=-4
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