j+3j-j=9

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Solution for j+3j-j=9 equation: 



j+3j-j=9

We move all terms to the left:

j+3j-j-(9)=0

We add all the numbers together, and all the variables

3j-9=0

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

3j=9

j=9/3

j=3

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