我想問裝蘋果時,如果每筐裝50個,就差一個筐;如果每筐裝55個,又空一個筐,問共有筐幾個?蘋果又有幾多個?
2006-12-26 09:32:40 · 5 個解答 · 發問者 Chun lok 1 in 科學 ➔ 數學
假設呢度有 x 個筐,
亦假設有 y 個蘋果。
如果每筐裝50個,就差一個筐;如果每筐裝55個,又空一個筐
即係:
50(x+1) = 55(x-1) = y
所以,
50x+50 = 55x-55
x = 21
代x =21 入 55(x-1) = y,
y = 1100
所以,
呢度有21個筐;同埋有1100個蘋果。
2006-12-26 09:42:19 · answer #1 · answered by TangPo Fung 1 · 0⤊ 0⤋
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2006-12-31 13:51:46 · answer #2 · answered by ? 7 · 0⤊ 0⤋
蘋果有1100個
筐有21個
因為21*55=1155
21*50=1050
1050+50*係1100
(50係筐裝幾多個)
1155-55*係1100
(55筐裝幾多個)
兩個答案都係1100
明唔明?
2006-12-26 09:46:12 · answer #3 · answered by Tak ho 1 · 0⤊ 0⤋
設有Y個蘋果,X個筐.
Y = 50 ( X + 1 ) --- (1)
Y= 55 ( X - 1 ) --- (2)
(1) = (2)
50 ( X + 1 ) = 55 ( X - 1 )
10X + 10 = 11X - 11
X = 21
把 X = 21 代入(2),
Y = 55 ( 21 - 1)
Y = 1100
因此,共有21個筐,1100個蘋果.
2006-12-26 09:42:44 · answer #4 · answered by ralf_wong 1 · 0⤊ 0⤋
設筐為Y, 設蘋果為A
Y+1=A / 50 -------1
Y-1=A / 55 ------2
From 1
50Y+50 = A
From 2
55Y-55 = A
50Y+50 = 55Y-55
55Y-50Y= 50+55
5Y= 105
Y=21
sub into 1
50Y+50=A
A= 50 x 21 +50
= 1100
筐有21個 '
蘋果1100個
2006-12-26 09:42:28 · answer #5 · answered by cheung 3 · 0⤊ 0⤋