21k-15=6

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Solution for 21k-15=6 equation: 



21k-15=6

We move all terms to the left:

21k-15-(6)=0

We add all the numbers together, and all the variables

21k-21=0

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

21k=21

k=21/21

k=1

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