15+2j=21

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Solution for 15+2j=21 equation: 



15+2j=21

We move all terms to the left:

15+2j-(21)=0

We add all the numbers together, and all the variables

2j-6=0

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

2j=6

j=6/2

j=3

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