(24-x)*5-32=48
(24-x)*5=48+32
(24-x)*5=80
24-x=80:5
24-x=16
x=24-16
x=8
720:(y:7+80)=6
y:7+80=720:6
y:7+80=120
y:7=120-80
y:7=40
y=40*7
y=280
200-(48:t)*45=20
(48:t)*45=200-20
(48:t)*45=180
48:t=180:45
48:t=4
t=48:4
t=12
(y*40+60):3=140
y*40+60=140*3
y*40+60=420
y*40=420-60
y*40=360
y=360:40
y=9