8k+21=3(-k+7)

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Solution for 8k+21=3(-k+7) equation: 



8k+21=3(-k+7)

We move all terms to the left:

8k+21-(3(-k+7))=0

We add all the numbers together, and all the variables

8k-(3(-1k+7))+21=0



We calculate terms in parentheses: -(3(-1k+7)), so:

3(-1k+7)

We multiply parentheses

-3k+21

Back to the equation:

-(-3k+21)



We get rid of parentheses

8k+3k-21+21=0

We add all the numbers together, and all the variables

11k=0

k=0/11

k=0

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