甲袋装有水果糖,每千克4.5元,乙袋装有奶糖,每千米6.4元,现在两袋糖混合在一起,每千克5.07元,那么水果糖是奶糖的( ).a.3/7 b.7/3 c.30% d.40%
来源:学生作业帮助网 编辑:作业帮 时间:2024/06/30 15:45:30
![甲袋装有水果糖,每千克4.5元,乙袋装有奶糖,每千米6.4元,现在两袋糖混合在一起,每千克5.07元,那么水果糖是奶糖的( ).a.3/7 b.7/3 c.30% d.40%](/uploads/image/z/5077362-66-2.jpg?t=%E7%94%B2%E8%A2%8B%E8%A3%85%E6%9C%89%E6%B0%B4%E6%9E%9C%E7%B3%96%2C%E6%AF%8F%E5%8D%83%E5%85%8B4.5%E5%85%83%2C%E4%B9%99%E8%A2%8B%E8%A3%85%E6%9C%89%E5%A5%B6%E7%B3%96%2C%E6%AF%8F%E5%8D%83%E7%B1%B36.4%E5%85%83%2C%E7%8E%B0%E5%9C%A8%E4%B8%A4%E8%A2%8B%E7%B3%96%E6%B7%B7%E5%90%88%E5%9C%A8%E4%B8%80%E8%B5%B7%2C%E6%AF%8F%E5%8D%83%E5%85%8B5.07%E5%85%83%2C%E9%82%A3%E4%B9%88%E6%B0%B4%E6%9E%9C%E7%B3%96%E6%98%AF%E5%A5%B6%E7%B3%96%E7%9A%84%EF%BC%88+%EF%BC%89.a.3%2F7+b.7%2F3+c.30%25+d.40%25)
甲袋装有水果糖,每千克4.5元,乙袋装有奶糖,每千米6.4元,现在两袋糖混合在一起,每千克5.07元,那么水果糖是奶糖的( ).a.3/7 b.7/3 c.30% d.40%
甲袋装有水果糖,每千克4.5元,乙袋装有奶糖,每千米6.4元,现在两袋糖混合在一起,每千克5.07元,那么
水果糖是奶糖的( ).a.3/7 b.7/3 c.30% d.40%
甲袋装有水果糖,每千克4.5元,乙袋装有奶糖,每千米6.4元,现在两袋糖混合在一起,每千克5.07元,那么水果糖是奶糖的( ).a.3/7 b.7/3 c.30% d.40%
选 b .
4.5x+6.4 = 5.07(1+x)
4.5x+6.4 = 5.07+5.07x
450x + 640 = 507 + 507x
57x = 133
x = 7/3