7/10k=21

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Solution for 7/10k=21 equation: 



7/10k=21

We move all terms to the left:

7/10k-(21)=0



Domain of the equation: 10k!=0

k!=0/10

k!=0

k∈R



We multiply all the terms by the denominator


-21*10k+7=0

Wy multiply elements

-210k+7=0

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

-210k=-7

k=-7/-210

k=1/30

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