12j-9=21+2j

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Solution for 12j-9=21+2j equation: 



12j-9=21+2j

We move all terms to the left:

12j-9-(21+2j)=0

We add all the numbers together, and all the variables

12j-(2j+21)-9=0

We get rid of parentheses

12j-2j-21-9=0

We add all the numbers together, and all the variables

10j-30=0

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

10j=30

j=30/10

j=3

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