21+5k=51

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Solution for 21+5k=51 equation: 



21+5k=51

We move all terms to the left:

21+5k-(51)=0

We add all the numbers together, and all the variables

5k-30=0

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

5k=30

k=30/5

k=6

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