(9360:4-8960:8+5180*7):4 = 9375
1) 9360:4 = 2340
2) 8960:8 = 1120
3) 5180*7 = 36260
4) 2340-1120 = 1240
5) 36260+1240 = 37500
6) 37500 : 4 = 9375
2/3=×/12
3x=24
x=8
2/9=y/36
9y=72
y=8
90/n=5/9
5n=810
n=162