12/5-(4/3x-1/6)=2/3

4/3х - 1/6 = 12/5 - 2/3

4/3х - 1/6 = 72/30 - 20/30

4/3х - 1/6 = 52/30

4/3х = 52/30 + 1/6

4/3х = 52/30 + 5/30

4/3х = 57/30

х = 57/30 : 4/3

х = 57/30 * 3/4

х = 57/10 * 1/4

х = 57/40

х = 1. 17/40