.2k+5=21

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Solution for .2k+5=21 equation: 



.2k+5=21

We move all terms to the left:

.2k+5-(21)=0

We add all the numbers together, and all the variables

.2k-16=0

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

.2k=16

k=16/.2

k=80

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