Question

【美国GMAT研究生入学考试 数学部分Quantitative笔记问题】

范例： A rabbit on a controlled diet is fed daily 300 grams of a mixture of two foods, food X and food Y. Food X cantains 10 predent pretein and food Y contains 15 precent pretein. If the rabbit's diet provides exactly 38 grams of protein daily, how many grams of food A are in the mixture?
笔记：
Total food grams: 300
Protein: Food X/pre : 10% 2/20
Food Y/pre: 15% 3/20
* 38g pretein food X, food X,how many grams?
英文的常规解题步骤格式 笔记是怎么样的？？？？

Answer 1

X+Y=300
0.1X+0.15Y=38
解出这个方程，X就是结果。

Answer 2

这个真心不知道啊