-
x:y= 1:2,y:z=2:5,則 x:y:z=?
- 1:2:5
- 1:3:4
- 2:3:5
- 2:4:5
-
x:y= 2:3,y:z=2:3,則 x:y:z=?
- 4:7:8
- 4:6:9
- 5:6:9
- 5:8:9
-
x:2y= 3:4,3y:z=9:1,則 x:y:z=
- 7:5:4
- 8:7:5
- 9:6:2
- 10:9:7
-
a:b:c=2:1:3,則 (3a-2b)/c=?
- 4/3
(3分之4)
- 5/3
(3分之5)
- 7/4
(4分之7)
- 8/5
(5分之8)
-
a:b= 2:3,a:c=2:3,則 (a+b):(b+c):c
- 3:5:4
- 4:7:9
- 2:5:7
- 5:6:3
-
2a=3b,4b=5c,則a:b:c=?
- 14:9:6
- 15:10:8
- 13:8:5
- 12:11:7
-
a/3=b/5=c/2,a+b+c=40,則a-b+2c=?
- 8
- 9
- 10
- 11
-
(a+b):(2a-b)=3:2,則 (a+3b)/a=?
- 15/4
- 17/5
- 13/7
- 12/11
-
3a=5a=4c,a-b+c=46,則a+b=?
- 39
- 45
- 57
- 64
-
a、b、c都不是0,a= 2c/5,b= 2c/3,則a:b:c=?
- 6:10:15
- 6:8:9
- 8:10:11
- 9:13:17