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-4(3d-5+2d)=-30
We move all terms to the left:
-4(3d-5+2d)-(-30)=0
We add all the numbers together, and all the variables
-4(5d-5)-(-30)=0
We add all the numbers together, and all the variables
-4(5d-5)+30=0
We multiply parentheses
-20d+20+30=0
We add all the numbers together, and all the variables
-20d+50=0
We move all terms containing d to the left, all other terms to the right
-20d=-50
d=-50/-20
d=2+1/2
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