360-2x=80
2x=280
x=140
30÷3x=5
3x=6
x=2
15-6x=2.4x5
15-6x=12
6x=3
x=0.5
18-12x=1.2x5

18-12x=6
12x=12
x=1

(120÷3x)÷8=36

(120÷3x)÷8=36
120÷3x=36X8
36X24x=120
x=120÷24÷36
x=5/36