7j-12=9

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Solution for 7j-12=9 equation: 



7j-12=9

We move all terms to the left:

7j-12-(9)=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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