1. 9х+50=86

9х=86-50

9х=36

х=36/9

х=4

2. 120:(x-19)=6

x-19=120:6

x-19=20

x=20+19

x=39

3. (y+50):14=4

y+50=4*14

y+50=56

y=56-50

y=6

4. 48+y:6=95

y:6=95-48

y:6=47

y=47*6

у=282