Mathematics
Junior High
Resolved
求解謝謝（紅筆為解析所寫）
A!
15
(C)36
(B)24
D48
= (4X)
a
2珏以一定的速率步行7公里長的路程,如果他步行1公里
本後,時速增加1公里(那麼就會比原來提早1小時走完全程
,
請問雲珏以原速率步行7公里所需的時間為多少小時?
(A)3.5
(B)2.5
b
(C)2
(D)1.4
3.若(3x-2y-5)和12x+5v
x + x + 1
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