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-19.1d=7.64
We move all terms to the left:
-19.1d-(7.64)=0
We add all the numbers together, and all the variables
-19.1d-7.64=0
We move all terms containing d to the left, all other terms to the right
-19.1d=7.64
d=7.64/-19.1
d=-4.6585365853659/11.646341463415
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