It depends on what number you plug in as x. If x=1 the answer is 3.5, then just add .5 for every number after like, x=2 the answer is 4 if x=3 the answer is 4.5 etc.
x=6
It is: 1/3 plus 1/3 = 2/3
1
2/3 plus 3/8 is equal to 25/24.
2/5 plus 1/3 plus 5/6 is equal to 1.57 or 1 57/100
2/3 + 4/6 = 4/3 or 11/3
2/3+1/4 =11\12
1/7 + 2/3 is 17/21
7/8.
1.75 or 13/4
(24 times 3) + (6 over 2) = 75
1 7/15
5/4