131.88=3.14*d

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Solution for 131.88=3.14*d equation: 



131.88=3.14d

We move all terms to the left:

131.88-(3.14d)=0

We add all the numbers together, and all the variables

-(+3.14d)+131.88=0

We get rid of parentheses

-3.14d+131.88=0

We move all terms containing d to the left, all other terms to the right

-3.14d=-131.88

d=-131.88/-3.14

d=+42

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