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8y+9=4(2y+1)
We move all terms to the left:
8y+9-(4(2y+1))=0
We calculate terms in parentheses: -(4(2y+1)), so:We get rid of parentheses
4(2y+1)
We multiply parentheses
8y+4
Back to the equation:
-(8y+4)
8y-8y-4+9=0
We add all the numbers together, and all the variables
5!=0
There is no solution for this equation
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