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5x+2(x-1)=7x+7
We move all terms to the left:
5x+2(x-1)-(7x+7)=0
We multiply parentheses
5x+2x-(7x+7)-2=0
We get rid of parentheses
5x+2x-7x-7-2=0
We add all the numbers together, and all the variables
-9!=0
There is no solution for this equation
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