17-x=4 1/8+5 3/8; х+7 1/7=9 2/7+1 3/7; 18-х=17 11/12-5 5/12; х-3=4 1/5+2 2/ решить уравнения

4 1/8 + 5 3/8 = 9 4/8
17-9 4/8 = 7 4/8

9 2/7 + 1 3/7 = 11
11- 7 1/7 = 3 6/7

17 11/12 - 5 5/12 = 12 6/12
18 - 12 6/12 = 5 6/12

4 1/5 + 2 2/5 = 6 3/5
6 3/5 + 3 = 9 3/5