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-15=-2+j
We move all terms to the left:
-15-(-2+j)=0
We add all the numbers together, and all the variables
-(j-2)-15=0
We get rid of parentheses
-j+2-15=0
We add all the numbers together, and all the variables
-1j-13=0
We move all terms containing j to the left, all other terms to the right
-j=13
j=13/-1
j=-13
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