(1+r)^7-8r-1=0

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Solution for (1+r)^7-8r-1=0 equation: 



(1+r)^7-8r-1=0

We add all the numbers together, and all the variables

(r+1)^7-8r-1=0

We add all the numbers together, and all the variables

-8r+(r+1)^7-1=0

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

-8r+(r+1)^7=1

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