Question

В первый день в киоске продали 12 наборов карандашей.а во второй день-18 таких же наборов.В проданных в первый день наборах было на 144 карандаша больше,чем в тех,что продали во второй день.Сколько карандашей в каждом наборе?

Answer 1

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Answer 2

1) 18 - 12 = 6 (наборов) - на столько больше продали во второй день

2) 144 : 6 = 24 (карандаша) - столько карандашей в одном наборе

Ответ: в каждом наборе по 24 карандаша. 

Answer 3

Solution:

Let's solve this step by step.

1. Let's denote the number of pencil sets sold on the first day as x and the number of pencil sets sold on the second day as y. 2. From the given information, we know that: - On the first day, 12 sets were sold. - On the second day, 18 sets were sold. 3. We also know that the sets sold on the first day had 144 more pencils than the sets sold on the second day.

Calculation:

We can set up the following system of equations to solve for the number of pencils in each set:

1. x + y = 30 (Total sets sold) 2. 12x - 18y = 144 (Difference in pencils)

Now, let's solve this system of equations to find the number of pencils in each set.

Solution:

Using the system of equations, we can solve for x and y:

1. x + y = 30 2. 12x - 18y = 144

Solving equation 1 for x, we get x = 30 - y.

Substitute x = 30 - y into equation 2: 12(30 - y) - 18y = 144 360 - 12y - 18y = 144 360 - 30y = 144 -30y = 144 - 360 -30y = -216 y = -216 / -30 y = 7.2

Now, substitute y = 7.2 into x = 30 - y: x = 30 - 7.2 x = 22.8

Since the number of sets sold must be a whole number, it seems there might be a mistake in the given information. The number of sets sold on each day should be whole numbers. Please double-check the given information and let me know if there are any corrections.

If the number of sets sold on each day is a whole number, we can proceed with the correct information to find the number of pencils in each set.