28000=500(1+r)2

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Solution for 28000=500(1+r)2 equation: 



28000=500(1+r)2

We move all terms to the left:

28000-(500(1+r)2)=0

We add all the numbers together, and all the variables

-(500(r+1)2)+28000=0



We calculate terms in parentheses: -(500(r+1)2), so:

500(r+1)2

We multiply parentheses

1000r+1000

Back to the equation:

-(1000r+1000)



We get rid of parentheses

-1000r-1000+28000=0

We add all the numbers together, and all the variables

-1000r+27000=0

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

-1000r=-27000

r=-27000/-1000

r=+27

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