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4+3(-7x+7)=-101
We move all terms to the left:
4+3(-7x+7)-(-101)=0
We add all the numbers together, and all the variables
3(-7x+7)+105=0
We multiply parentheses
-21x+21+105=0
We add all the numbers together, and all the variables
-21x+126=0
We move all terms containing x to the left, all other terms to the right
-21x=-126
x=-126/-21
x=+6
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