21-9j=-2j

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



21-9j=-2j

We move all terms to the left:

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

We get rid of parentheses

-9j+2j+21=0

We add all the numbers together, and all the variables

-7j+21=0

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

-7j=-21

j=-21/-7

j=+3

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