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3d-15=3(d-5)
We move all terms to the left:
3d-15-(3(d-5))=0
We calculate terms in parentheses: -(3(d-5)), so:We get rid of parentheses
3(d-5)
We multiply parentheses
3d-15
Back to the equation:
-(3d-15)
3d-3d+15-15=0
We add all the numbers together, and all the variables
=0
d=0/1
d=0
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