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7(x+6)+7=7x+7
We move all terms to the left:
7(x+6)+7-(7x+7)=0
We multiply parentheses
7x-(7x+7)+42+7=0
We get rid of parentheses
7x-7x-7+42+7=0
We add all the numbers together, and all the variables
42!=0
There is no solution for this equation
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