(1+b)9=90

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Solution for (1+b)9=90 equation: 



(1+b)9=90

We move all terms to the left:

(1+b)9-(90)=0

We add all the numbers together, and all the variables

(b+1)9-90=0

We multiply parentheses

9b+9-90=0

We add all the numbers together, and all the variables

9b-81=0

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

9b=81

b=81/9

b=9

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