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-5d+16.72=-7.22-6.9d
We move all terms to the left:
-5d+16.72-(-7.22-6.9d)=0
We add all the numbers together, and all the variables
-5d-(-6.9d-7.22)+16.72=0
We get rid of parentheses
-5d+6.9d+7.22+16.72=0
We add all the numbers together, and all the variables
1.9d+23.94=0
We move all terms containing d to the left, all other terms to the right
1.9d=-23.94
d=-23.94/1.9
d=-12+1/1.6666666666667
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