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-m+8(5-8m)=300
We move all terms to the left:
-m+8(5-8m)-(300)=0
We add all the numbers together, and all the variables
-m+8(-8m+5)-300=0
We add all the numbers together, and all the variables
-1m+8(-8m+5)-300=0
We multiply parentheses
-1m-64m+40-300=0
We add all the numbers together, and all the variables
-65m-260=0
We move all terms containing m to the left, all other terms to the right
-65m=260
m=260/-65
m=-4
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