(k/2)*21=147

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Solution for (k/2)*21=147 equation: 



(k/2)*21=147

We move all terms to the left:

(k/2)*21-(147)=0

We add all the numbers together, and all the variables

(+k/2)*21-147=0

We multiply parentheses

21k-147=0

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

21k=147

k=147/21

k=7

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