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8(-5x-5)=240
We move all terms to the left:
8(-5x-5)-(240)=0
We multiply parentheses
-40x-40-240=0
We add all the numbers together, and all the variables
-40x-280=0
We move all terms containing x to the left, all other terms to the right
-40x=280
x=280/-40
x=-7
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