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-2x+7(x-7)=-14
We move all terms to the left:
-2x+7(x-7)-(-14)=0
We add all the numbers together, and all the variables
-2x+7(x-7)+14=0
We multiply parentheses
-2x+7x-49+14=0
We add all the numbers together, and all the variables
5x-35=0
We move all terms containing x to the left, all other terms to the right
5x=35
x=35/5
x=7
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