31=2(3.14)d

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Solution for 31=2(3.14)d equation: 



31=2(3.14)d

We move all terms to the left:

31-(2(3.14)d)=0



We calculate terms in parentheses: -(2(3.14)d), so:

2(3.14)d

We multiply parentheses

6.28d

Back to the equation:

-(6.28d)



We add all the numbers together, and all the variables

-(+6.28d)+31=0

We get rid of parentheses

-6.28d+31=0

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

-6.28d=-31

d=-31/-6.28

d=4+3.1276595744681/3.3404255319149

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