3j+9=30

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Solution for 3j+9=30 equation: 



3j+9=30

We move all terms to the left:

3j+9-(30)=0

We add all the numbers together, and all the variables

3j-21=0

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

3j=21

j=21/3

j=7

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