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7x+21x-10=7(4x+9)
We move all terms to the left:
7x+21x-10-(7(4x+9))=0
We add all the numbers together, and all the variables
28x-(7(4x+9))-10=0
We calculate terms in parentheses: -(7(4x+9)), so:We get rid of parentheses
7(4x+9)
We multiply parentheses
28x+63
Back to the equation:
-(28x+63)
28x-28x-63-10=0
We add all the numbers together, and all the variables
-73!=0
There is no solution for this equation
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