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-2x-51=-7x+34
We move all terms to the left:
-2x-51-(-7x+34)=0
We get rid of parentheses
-2x+7x-34-51=0
We add all the numbers together, and all the variables
5x-85=0
We move all terms containing x to the left, all other terms to the right
5x=85
x=85/5
x=17
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