18/30-x=4/30+6/30
(13/67+6/67)-x=9/67
10/15+(5/15-x)=14/15
34/60+8/60+y=41/60+16/60
64/70-(x+26/70)=5/70
x+27/46=35/46+2/46

Пошаговое объяснение:

18/30 -x=4/30 +6/30   |×30/2

15x=9-(2+3)

x=4/15

(13/67 +6/67)-x=9/67     |×67

67x=13+6-9

x=10/67

10/15 +(5/15 -x)=14/15     |×15

15x=10+5-14

x=1/15

34/60 +8/60 +y=41/60 +16/60     |×60

60y=41+16-34-8

y=15/60=1/4=0,25

64/70 -(x +26/70)=5/70     |×70

70x=64-26-5

x=33/70

x +27/46=35/46 +2/46     |×46

46x=35+2-27

x=10/46=5/23