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5(-x+8)-7x=100
We move all terms to the left:
5(-x+8)-7x-(100)=0
We add all the numbers together, and all the variables
5(-1x+8)-7x-100=0
We add all the numbers together, and all the variables
-7x+5(-1x+8)-100=0
We multiply parentheses
-7x-5x+40-100=0
We add all the numbers together, and all the variables
-12x-60=0
We move all terms containing x to the left, all other terms to the right
-12x=60
x=60/-12
x=-5
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