3k+4.2=21

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Solution for 3k+4.2=21 equation: 



3k+4.2=21

We move all terms to the left:

3k+4.2-(21)=0

We add all the numbers together, and all the variables

3k-16.8=0

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

3k=16.8

k=16.8/3

k=5+1/1.6666666666667

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