9-3j=21

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Solution for 9-3j=21 equation: 



9-3j=21

We move all terms to the left:

9-3j-(21)=0

We add all the numbers together, and all the variables

-3j-12=0

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

-3j=12

j=12/-3

j=-4

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