-81=7k+19-3k

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Solution for -81=7k+19-3k equation: 



-81=7k+19-3k

We move all terms to the left:

-81-(7k+19-3k)=0

We add all the numbers together, and all the variables

-(4k+19)-81=0

We get rid of parentheses

-4k-19-81=0

We add all the numbers together, and all the variables

-4k-100=0

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

-4k=100

k=100/-4

k=-25

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