Question

Lz

想知道第一個步驟的轉換是為什麼

(1)已知3x:2y:z=3:8:7,且y=20,則
2x+z=?
(2)若(x-2):(y+1):(z+4)=
4:56,且3x+2y+z=280,則x:y:z
= ?
回確炸中
38
L
(1) α = y = z = 3 ⋅ 7 · 1
Z
2
4 = 20 = 1 = 20 => 8 = 5
0010+35=454
STO)
3.5=5 7.5=35 0 (0)

Answer 1

Mer

令3x=3r
2y=8r
z=7r
故x=r
y=4r
x:y:z=r:4r:7r=1:4:7