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6(3+d)+3d=9(2+d)
We move all terms to the left:
6(3+d)+3d-(9(2+d))=0
We add all the numbers together, and all the variables
6(d+3)+3d-(9(d+2))=0
We add all the numbers together, and all the variables
3d+6(d+3)-(9(d+2))=0
We multiply parentheses
3d+6d-(9(d+2))+18=0
We calculate terms in parentheses: -(9(d+2)), so:We add all the numbers together, and all the variables
9(d+2)
We multiply parentheses
9d+18
Back to the equation:
-(9d+18)
9d-(9d+18)+18=0
We get rid of parentheses
9d-9d-18+18=0
We add all the numbers together, and all the variables
=0
d=0/1
d=0
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