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7x+9=7(x-4)
We move all terms to the left:
7x+9-(7(x-4))=0
We calculate terms in parentheses: -(7(x-4)), so:We get rid of parentheses
7(x-4)
We multiply parentheses
7x-28
Back to the equation:
-(7x-28)
7x-7x+28+9=0
We add all the numbers together, and all the variables
37!=0
There is no solution for this equation
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