121-57=k+80

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Solution for 121-57=k+80 equation: 



121-57=k+80

We move all terms to the left:

121-57-(k+80)=0

We add all the numbers together, and all the variables

-(k+80)+64=0

We get rid of parentheses

-k-80+64=0

We add all the numbers together, and all the variables

-1k-16=0

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

-k=16

k=16/-1

k=-16

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