550=900(1-d)

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Solution for 550=900(1-d) equation: 



550=900(1-d)

We move all terms to the left:

550-(900(1-d))=0

We add all the numbers together, and all the variables

-(900(-1d+1))+550=0



We calculate terms in parentheses: -(900(-1d+1)), so:

900(-1d+1)

We multiply parentheses

-900d+900

Back to the equation:

-(-900d+900)



We get rid of parentheses

900d-900+550=0

We add all the numbers together, and all the variables

900d-350=0

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

900d=350

d=350/900

d=7/18

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