x - 2 7/12 = 5 3/18
x = 5 3/18 + 2 7/12
x = 5 6/36 + 2 21/36
x = 7 27/36
x = 7 3/4
x - 2 7/12 = 5 1/6
x = 5 1/6 + 2 7/12
x = 5 2/12 + 2 7/12
x = 7 9/12
