Alright, Tricia, I promise this is easier than it seems! We want to isolate j, right?
3(2j - k) = 108
First, we are multiplying 3 by 2j - k, so we are going to do the opposite and divide each side by 3.
2j - k = 36
We have to move k, so we add k to both sides.
2j = k + 36
What's left? We divide both sides by 2. Remember that we have to do the entire right side.
j = (k + 36)/2
We can go one more step and divide the right side into k/2 + 36/2. Since 36/2 = 18, we end up with...
j = k/2 + 18
Hope this helps!
