All you have to do is set these problems up in an equation and add them all up. To get mix numbers to improper fractions all you do is multiply the denominator by the number in front, add the numerator to that number, then put it all over the denominator. So for example 2 1/2 would be (2*2) +1 all over 2 so 5/2
1 1/3 + 3/4 + 1 1/4 + 1 1/4 + x = 8
4/3 + 13/4 +x = 8
16/12 +39/12 + x = 8
54/12+x=8
x= (96-54)/12
x= 42/12 = 3 1/2
