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(J)=3J-2
We move all terms to the left:
(J)-(3J-2)=0
We get rid of parentheses
J-3J+2=0
We add all the numbers together, and all the variables
-2J+2=0
We move all terms containing J to the left, all other terms to the right
-2J=-2
J=-2/-2
J=1
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