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-10(x-5)=-80
We move all terms to the left:
-10(x-5)-(-80)=0
We add all the numbers together, and all the variables
-10(x-5)+80=0
We multiply parentheses
-10x+50+80=0
We add all the numbers together, and all the variables
-10x+130=0
We move all terms containing x to the left, all other terms to the right
-10x=-130
x=-130/-10
x=+13
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