Question

ОООЧЧЕЕЕНЬ СРООООЧНОООО\ученикам надо раздавать тетради, если каждому ученику давать по 4 тетради, то останется 12 тетрадей, если давать по 5 тетрадей, то не хватит 7 ученикам. сколько было тетрадей и сколько учеников

Answer 1

Пусть учеников = х, тетрадей =у, тогда
4х = у - 12
5(х-7) = у

у = 4х + 12
5х - 35 = 4х + 12
х = 47 - учеников
у = 4 * 47 + 12 = 200 - тетрадей

Answer 2

Problem Analysis

The problem states that if each student is given 4 notebooks, there will be 12 notebooks left, and if each student is given 5 notebooks, there won't be enough for 7 students. We need to find the total number of notebooks and the number of students.

Solution

Let's denote the total number of notebooks as N and the number of students as S.

According to the given information: 1. If each student is given 4 notebooks, there will be 12 notebooks left: N % 4 = 12. 2. If each student is given 5 notebooks, there won't be enough for 7 students: N / 5 < 7.

Calculations

Let's solve the equations to find the values of N and S.

1. From the first condition: N % 4 = 12. - The total number of notebooks N is 12 more than a multiple of 4.

2. From the second condition: N / 5 < 7. - The total number of notebooks N divided by 5 is less than 7.

Conclusion

By solving the above equations, we can find the values of N and S. Let's calculate the values.