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4(-4-8m)+28m=-272
We move all terms to the left:
4(-4-8m)+28m-(-272)=0
We add all the numbers together, and all the variables
4(-8m-4)+28m-(-272)=0
We add all the numbers together, and all the variables
28m+4(-8m-4)+272=0
We multiply parentheses
28m-32m-16+272=0
We add all the numbers together, and all the variables
-4m+256=0
We move all terms containing m to the left, all other terms to the right
-4m=-256
m=-256/-4
m=+64
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