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d=80/3.14
We move all terms to the left:
d-(80/3.14)=0
We add all the numbers together, and all the variables
d-(+80/3.14)=0
We get rid of parentheses
d-80/3.14=0
We multiply all the terms by the denominator
d*3.14-80=0
Wy multiply elements
3.14d-80=0
We move all terms containing d to the left, all other terms to the right
3.14d=80
d=80/3.14
d=25+1/2.0933333333333
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