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7(x+3)+4=7x+3
We move all terms to the left:
7(x+3)+4-(7x+3)=0
We multiply parentheses
7x-(7x+3)+21+4=0
We get rid of parentheses
7x-7x-3+21+4=0
We add all the numbers together, and all the variables
22!=0
There is no solution for this equation
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