1/3x+4:2/3x-4=5:4

According to the fact that inward products are equal to outward products:

( 1/3x+4)*5=(2/3x-4)*4

5/3x+20=8/3x- 16

x=36

36*4/9= 16 yuan

A: Remaining 16 yuan.

3/4 of 2.20g is 15g,

20 meters is four-fifths of 25 meters,

36 is 6/5 of 30,

15: 18=20:24=35:42

60/(2+3+5)=6 .............

6*2= 12 ............ number

0.5 hectare: 150 km2 = 1:30000.

2.5 square kilometers: 4 square meters =625000: 1

45 minutes: 1/20 hours = 15: 1