121=9k+2k

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Solution for 121=9k+2k equation: 



121=9k+2k

We move all terms to the left:

121-(9k+2k)=0

We add all the numbers together, and all the variables

-(+11k)+121=0

We get rid of parentheses

-11k+121=0

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

-11k=-121

k=-121/-11

k=+11

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