21+8k=61

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Solution for 21+8k=61 equation: 



21+8k=61

We move all terms to the left:

21+8k-(61)=0

We add all the numbers together, and all the variables

8k-40=0

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

8k=40

k=40/8

k=5

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