[解題] 國一不等式
1.年級:國一
2.科目:數學
3.章節:5-2
4.題目:某遊樂場的入園卷,大人每張200元 小孩每張120元
團體票(需至少20人以上(含)則照原價打75折。已經知道陳老師
一行人共有大人8人 小孩若干人,但總數不到20人,則當小孩有幾人
以上(含)時,買團體票才會比較便宜?
5.想法: 設小孩有X人以上(含),買團體票比較便宜
則200*8+120X> (200*8+120*12)*0.75
X>5.666 所以要6人以上
可是覺得6人以上 可能是7人 但是和大人八人也沒到20人
怎麼可以買團體票呢?
謝謝
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