28=-7+7k

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Solution for 28=-7+7k equation: 



28=-7+7k

We move all terms to the left:

28-(-7+7k)=0

We add all the numbers together, and all the variables

-(7k-7)+28=0

We get rid of parentheses

-7k+7+28=0

We add all the numbers together, and all the variables

-7k+35=0

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

-7k=-35

k=-35/-7

k=+5

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