(11+k)3=90

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Solution for (11+k)3=90 equation: 



(11+k)3=90

We move all terms to the left:

(11+k)3-(90)=0

We add all the numbers together, and all the variables

(k+11)3-90=0

We multiply parentheses

3k+33-90=0

We add all the numbers together, and all the variables

3k-57=0

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

3k=57

k=57/3

k=19

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