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-3j+15j-5j-13j=-8
We move all terms to the left:
-3j+15j-5j-13j-(-8)=0
We add all the numbers together, and all the variables
-6j+8=0
We move all terms containing j to the left, all other terms to the right
-6j=-8
j=-8/-6
j=1+1/3
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