文具店出售定价分别为8元和12元的两种纪念册,且两种纪念册的进价都是定价的70%,小文具店出售定价分别为8元和12元的两种纪念册,且两种纪念册的进价都是定价的70%,小明共带108元钱,他欲买
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/06 16:52:36
![文具店出售定价分别为8元和12元的两种纪念册,且两种纪念册的进价都是定价的70%,小文具店出售定价分别为8元和12元的两种纪念册,且两种纪念册的进价都是定价的70%,小明共带108元钱,他欲买](/uploads/image/z/2418029-53-9.jpg?t=%E6%96%87%E5%85%B7%E5%BA%97%E5%87%BA%E5%94%AE%E5%AE%9A%E4%BB%B7%E5%88%86%E5%88%AB%E4%B8%BA8%E5%85%83%E5%92%8C12%E5%85%83%E7%9A%84%E4%B8%A4%E7%A7%8D%E7%BA%AA%E5%BF%B5%E5%86%8C%2C%E4%B8%94%E4%B8%A4%E7%A7%8D%E7%BA%AA%E5%BF%B5%E5%86%8C%E7%9A%84%E8%BF%9B%E4%BB%B7%E9%83%BD%E6%98%AF%E5%AE%9A%E4%BB%B7%E7%9A%8470%25%2C%E5%B0%8F%E6%96%87%E5%85%B7%E5%BA%97%E5%87%BA%E5%94%AE%E5%AE%9A%E4%BB%B7%E5%88%86%E5%88%AB%E4%B8%BA8%E5%85%83%E5%92%8C12%E5%85%83%E7%9A%84%E4%B8%A4%E7%A7%8D%E7%BA%AA%E5%BF%B5%E5%86%8C%2C%E4%B8%94%E4%B8%A4%E7%A7%8D%E7%BA%AA%E5%BF%B5%E5%86%8C%E7%9A%84%E8%BF%9B%E4%BB%B7%E9%83%BD%E6%98%AF%E5%AE%9A%E4%BB%B7%E7%9A%8470%25%2C%E5%B0%8F%E6%98%8E%E5%85%B1%E5%B8%A6108%E5%85%83%E9%92%B1%2C%E4%BB%96%E6%AC%B2%E4%B9%B0)
文具店出售定价分别为8元和12元的两种纪念册,且两种纪念册的进价都是定价的70%,小文具店出售定价分别为8元和12元的两种纪念册,且两种纪念册的进价都是定价的70%,小明共带108元钱,他欲买
文具店出售定价分别为8元和12元的两种纪念册,且两种纪念册的进价都是定价的70%,小
文具店出售定价分别为8元和12元的两种纪念册,且两种纪念册的进价都是定价的70%,小明共带108元钱,他欲买一定数量的某一种纪念册,若买每册12元的钱不够,但文具店老板考虑到定价为12元的纪念册不太好出售,于是如数给了小明这种纪念册,结果文具店获利和卖出同数量的每册8元的纪念册一样多,那么小明共买了多少本纪念册?
可怜可怜我吧,纯手打的.= .=..
文具店出售定价分别为8元和12元的两种纪念册,且两种纪念册的进价都是定价的70%,小文具店出售定价分别为8元和12元的两种纪念册,且两种纪念册的进价都是定价的70%,小明共带108元钱,他欲买
∵赚的与卖8元的一样多 ∴每册赚8*30%=2.4元
则12元的每册进价12*70%=8.4元
则老板每册卖给他每册8.4+2.4=10.8元
则一共卖了108/10.8=10本
方程:设买了x本.
108-12•70%x=8(1-70%)x
x=10
设买x册,由题意有x>108/12=9, 108-12•70%x=8(1-70%)x 解得x=10 思路:等式左边表示售价108元减去老板的成本,右边表示卖一件8元产品的利润乘以卖的册数
10
转的与卖8元的一样多说明每册赚8*30%=2.4元
卖12元的每册进价12*70%=8.4元
则老板每册卖给他每册8.4+2.4=10.8元
则一共卖了108/10.8=10册
x本
x=10
11111111111111111111111111111111111111
hhjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjj