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Zhang Ming and Li Gang both eat in the canteen. The ratio of their meal tickets is 4:3. Zhang Ming uses 6 yuan meal tickets every day, and Li Gang uses 5 yuan meal tickets every day. When Li Gang's meal tickets are used up, Zhang Ming still has 10 yuan meal tickets. It turns out that each of them has () yuan meal tickets
Let two people eat for X days
6X + 10:5x = 4:3 Zhang Ming: 15 times 6 + 10 = 100 yuan
20x-18x = 30 Li Gang: 15 times 5 = 75
X = 15 checking calculation: Zhang Ming: Li Gang = 100:75 = 4:3
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