5元和2元硬幣各有N枚,共值266元,兩款硬幣各有多少枚??(方程)
2007-05-07 15:02:42 · 5 個解答 · 發問者 Ky 2 in 科學 ➔ 數學
解：
5N+2N=266
7N=266
N=266/7
N=38
驗證：
5x38+2x38(相等於方程式中第一列)
=(5+2)x38(相等於方程式中第二列)
=7x38(相等於方程式中第二列)
=266
2007-05-07 15:23:53 · answer #1 · answered by nicholas 7 · 0⤊ 0⤋
5元和2元硬幣各有N枚,共值266元,兩款硬幣各有多少枚?
5N+2N=266
7N=266
N=36.15
2007-05-07 17:45:43 · answer #2 · answered by 聖杯戰爭 2 · 0⤊ 0⤋
38元!迫織
2007-05-07 16:00:56 · answer #3 · answered by chung yin 1 · 0⤊ 0⤋
N(5+2)=266
7N=266
N=266/7
N=38
2007-05-07 15:35:07 · answer #4 · answered by 文詩 3 · 0⤊ 0⤋
5N+2N=266
N=38
5元硬幣有38枚，2元硬幣有38枚。
唔係咩？
2007-05-07 15:10:23 · answer #5 · answered by ? 1 · 0⤊ 0⤋