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-15+15(2d-1)=7-5
We move all terms to the left:
-15+15(2d-1)-(7-5)=0
We add all the numbers together, and all the variables
15(2d-1)-15-2=0
We add all the numbers together, and all the variables
15(2d-1)-17=0
We multiply parentheses
30d-15-17=0
We add all the numbers together, and all the variables
30d-32=0
We move all terms containing d to the left, all other terms to the right
30d=32
d=32/30
d=1+1/15
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