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-2.6d+9.3=-5.3d-3.12
We move all terms to the left:
-2.6d+9.3-(-5.3d-3.12)=0
We get rid of parentheses
-2.6d+5.3d+3.12+9.3=0
We add all the numbers together, and all the variables
2.7d+12.42=0
We move all terms containing d to the left, all other terms to the right
2.7d=-12.42
d=-12.42/2.7
d=-4+1/1.6666666666667
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