Question

За 7 пачек печенья и 2 коробки конфет заплатили 324,4 руб.Сколько стоит коробка конфет,если она в 4 раза дороже пачки печенья

Answer 1

Пусть х ---- стоимость пачки печенья 
4х ---- стоимость пачки конфет
 составим уравнение
7*х+2*4х=324,4
7x+8x=324.4
15x=324.4
x=324.4:15
x=21.62(печенье)
21.62*4=86.48(конфеты)

Answer 2

Calculation of the Cost of a Box of Chocolates

To find the cost of a box of chocolates, we need to use the given information that 7 packs of cookies and 2 boxes of chocolates were purchased for a total of 324.4 rubles. We also know that the box of chocolates is 4 times more expensive than a pack of cookies.

Let's assume that the cost of a pack of cookies is x rubles. According to the given information, the cost of a box of chocolates would be 4x rubles.

We can set up the following equation to represent the total cost:

7x + 2(4x) = 324.4

Simplifying the equation, we have:

7x + 8x = 324.4

Combining like terms, we get:

15x = 324.4

To solve for x, we divide both sides of the equation by 15:

x = 324.4 / 15

Evaluating the expression, we find:

x ≈ 21.6267

Therefore, the cost of a pack of cookies is approximately 21.63 rubles.

Since the box of chocolates is 4 times more expensive than a pack of cookies, we can multiply the cost of a pack of cookies by 4 to find the cost of a box of chocolates:

4 * 21.63 ≈ 86.52

Therefore, the cost of a box of chocolates is approximately 86.52 rubles.

Answer: The box of chocolates costs approximately 86.52 rubles.