1 7/9÷х=2 2/3÷3/10
2 2/3×х=1 7/9×3/10
2 2/3х=16/9×3/10
2 2/3х=8/3×1/5
2 2/3х=8/15
х=8/15÷2 2/3
х=8/15÷8/3
х=8/15×3/8
х=1/5
( 9х - 4 ) + ( 15х - 5 ) = 18 - ( 25 - 22х )
9х - 4 + 15х - 5 = 18 - 25 + 22х
24х - 9 = 22х - 7
24х - 22х = 9 - 7
2х = 2
Х = 1
1) 4/5=100:5*4=80%
2) 3/4=100:4*3=75%
3) 7/25=100:25*7=28%
4) 1/2=100:2*1=50%
1/8=100:8/1=12,5%
V= adc.
<span>V= </span>80*40*60=192000
192000/1000=192