Question

На одной тарелке было 5 пирожков, а на другой – 10. После того как за обедом съели несколько пирожков, на двух тарелках осталось 9 пирожков. Сколько пирожков съели за обедом?

Answer 1

5+10=15 пирожков было
15-х=9
х=15-9
х=6
ответ 6 съели

Answer 2

5+10=15
15-х=9
х= 15-9
Х=6
Ответ: за обедом съели 6 пирожков.

Answer 3

Calculation of the Number of Pastries Eaten

To determine the number of pastries eaten for lunch, we can use the information provided. Initially, there were 5 pastries on one plate and 10 pastries on the other plate. After lunch, there were 9 pastries remaining on both plates. We need to find out how many pastries were eaten.

Let's assume that x represents the number of pastries eaten for lunch.

The equation can be set up as follows:

5 (initial pastries on one plate) + 10 (initial pastries on the other plate) - x (pastries eaten) = 9 (remaining pastries on both plates)

Simplifying the equation:

5 + 10 - x = 9

Combining like terms:

15 - x = 9

To solve for x, we need to isolate the variable. Subtracting 15 from both sides of the equation:

15 - x - 15 = 9 - 15

Simplifying:

-x = -6

Multiplying both sides of the equation by -1 to isolate x:

x = 6

Therefore, 6 pastries were eaten for lunch.