21+8k=-7

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Solution for 21+8k=-7 equation: 



21+8k=-7

We move all terms to the left:

21+8k-(-7)=0

We add all the numbers together, and all the variables

8k+28=0

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

8k=-28

k=-28/8

k=-3+1/2

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