X-7 1/2+2 1/3=4 7/12

x-7 1/2= 4 7/12-2 1/3 =2 7-4/12=2 3/12
x- 7 1/2= 2 3/12
x= 7 1/2+ 2 3/12 = 9 6+3 / 12= 9 9/12
x=9 9/12 = 9 3/4
9 3/4 - 7 1/2 + 2 1/3 = 4 7/12