9s/3=21

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Solution for 9s/3=21 equation: 



9s/3=21

We move all terms to the left:

9s/3-(21)=0

We multiply all the terms by the denominator


9s-21*3=0

We add all the numbers together, and all the variables

9s-63=0

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

9s=63

s=63/9

s=7

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