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-7.5(4-6d)=21.5
We move all terms to the left:
-7.5(4-6d)-(21.5)=0
We add all the numbers together, and all the variables
-7.5(-6d+4)-(21.5)=0
We add all the numbers together, and all the variables
-7.5(-6d+4)-21.5=0
We multiply parentheses
45d-30-21.5=0
We add all the numbers together, and all the variables
45d-51.5=0
We move all terms containing d to the left, all other terms to the right
45d=51.5
d=51.5/45
d=1+1.85714285714/12.8571428571
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