Question

chen

兩題求解

15
20
4. 已知xy=≠0,且2xy=3y:=5=x,若x、y、z的最小公倍數為120,則:
(1)x:y:== z:3:53:5:2
(2)x+y+==
。
40

Answer 1

✨ Jawaban Terbaik ✨

Mer

同除以xyz
2/z = 3/x = 5/y
x:y:z = 3:5:2

Mer

3r，5r，2r
[3r,5r,2r]=30r
30r=120
r=4
10r=40

Answer 2

Chiao蕎

這樣