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2(x-1)=-100
We move all terms to the left:
2(x-1)-(-100)=0
We add all the numbers together, and all the variables
2(x-1)+100=0
We multiply parentheses
2x-2+100=0
We add all the numbers together, and all the variables
2x+98=0
We move all terms containing x to the left, all other terms to the right
2x=-98
x=-98/2
x=-49
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