Question 23152
#1 x= 1/3 + 9/4 = 4/27 + 27/12 = 31/12
#2 s = -5/12 + 7/24 = -10/24 + 7/24 = -3/24 = -1/8
#3 -10y+24-8y+20=3+8y-y
    -18y+44 = 3+7y
         25y= 41
           y= 41/25
#4 12+1+y=2y
       y= 13
#5 2y=-y-1/-1
   3y = 1
    y = 1/3

Cheers,
Stan H.