2 1/6-(x+1 1/12)=4 3/4

2_1/6 - (x + 1_1/12) =4_3/4

2_1/6 - x - 1_1/12 = 4_3/4

2_2/12 - 1_1/12 - x = 4_9/12

1_1/12 - x = 4_9/12

x = 1_1/12 - 4_9/12

x = - (4_9/12 - 1_1/12)

x = - 3_ 8/12 = - 3_2/3