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-7.86+15.9d=19.4d+19.53+16.01
We move all terms to the left:
-7.86+15.9d-(19.4d+19.53+16.01)=0
We add all the numbers together, and all the variables
15.9d-(19.4d+35.54)-7.86=0
We get rid of parentheses
15.9d-19.4d-35.54-7.86=0
We add all the numbers together, and all the variables
-3.5d-43.4=0
We move all terms containing d to the left, all other terms to the right
-3.5d=43.4
d=43.4/-3.5
d=-12+1/2.5
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