A solution to a equation is when the variable is substituted fully. That makes the equation true.
Well, you have to be given an interval. That is not an interval.
You should be given something like

If you add those fractions up you'll just get a point on the number line.
Find the LCD for all of them which is 9/6 - 4/6 + 3/6 = 8/6 = 2/3
You'll end up with a point on 2/3
It could be 1, I'm not really sure
The median is effectively the middle number, so first we need to order them from smallest to biggest, which would be:
0.5, 1, 1.5, 2,2, 3.3, 5.4, 6.2, 8.4, 8.8
Therefore, the median is 3.3.
Hope this helps!