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4(5x-5)=-140
We move all terms to the left:
4(5x-5)-(-140)=0
We add all the numbers together, and all the variables
4(5x-5)+140=0
We multiply parentheses
20x-20+140=0
We add all the numbers together, and all the variables
20x+120=0
We move all terms containing x to the left, all other terms to the right
20x=-120
x=-120/20
x=-6
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