220=860(1-d)

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Solution for 220=860(1-d) equation: 



220=860(1-d)

We move all terms to the left:

220-(860(1-d))=0

We add all the numbers together, and all the variables

-(860(-1d+1))+220=0



We calculate terms in parentheses: -(860(-1d+1)), so:

860(-1d+1)

We multiply parentheses

-860d+860

Back to the equation:

-(-860d+860)



We get rid of parentheses

860d-860+220=0

We add all the numbers together, and all the variables

860d-640=0

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

860d=640

d=640/860

d=32/43

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