Question

yuuu🐋

求解🙏🙏

5
如右圖, L // M || N,AF=2x-1,FB=2,CE=3x-1,ED =
=-x,
3
(A)
3
10
(B)1
(C)2
3
(D)2或-
10
則x=? 答:
A C
32x-+ 18/29
E
F
DB
2X-1
L
-M
N

Answer 1

高中探險的初心者

平行線截等比例線段
AF:FB=CE:ED
=>FB*CE=ED*AF
=>2(3x-1)=(2x-1)*(5x/3)
=>18x-6=10(x^2)-5x
=>10(x^2)-23x+6=(10x-3)(x-2)=0
=>x=3/10or2#(D)