11520=9000(1+(4)r)

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Solution for 11520=9000(1+(4)r) equation: 



11520=9000(1+(4)r)

We move all terms to the left:

11520-(9000(1+(4)r))=0

We add all the numbers together, and all the variables

-(9000(4r+1))+11520=0



We calculate terms in parentheses: -(9000(4r+1)), so:

9000(4r+1)

We multiply parentheses

36000r+9000

Back to the equation:

-(36000r+9000)



We get rid of parentheses

-36000r-9000+11520=0

We add all the numbers together, and all the variables

-36000r+2520=0

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

-36000r=-2520

r=-2520/-36000

r=7/100

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