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23=3.14d
We move all terms to the left:
23-(3.14d)=0
We add all the numbers together, and all the variables
-(+3.14d)+23=0
We get rid of parentheses
-3.14d+23=0
We move all terms containing d to the left, all other terms to the right
-3.14d=-23
d=-23/-3.14
d=7+1/3.078431372549
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