39.55=21.55+k

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Solution for 39.55=21.55+k equation: 



39.55=21.55+k

We move all terms to the left:

39.55-(21.55+k)=0

We add all the numbers together, and all the variables

-(k+21.55)+39.55=0

We get rid of parentheses

-k-21.55+39.55=0

We add all the numbers together, and all the variables

-1k+18=0

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

-k=-18

k=-18/-1

k=+18

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