Question

У мальчика было 16 почтовых марок. Он купил ещё несколько марок, после этого отдал брату 23 марки, и у него осталось 19 марок. Сколько марок купил мальчик?<br />

Answer 1

16+x-23=19
16+x-23-19=0
16+x-42=0
x=42-16
x=26

Answer 2

19+23=42 марки всего было
42-16=26 марок купил мальчик

Answer 3

Calculating the Number of Stamps Bought by the Boy

Let's solve the problem step by step.

The boy initially had 16 postal stamps. After buying some more stamps, he gave 23 stamps to his brother and had 19 stamps left.

To find out how many stamps the boy bought, we can use the following equation:

16 (initial stamps) + x (additional stamps bought) - 23 (given to brother) = 19 (remaining stamps)

Solving for x (additional stamps bought):

16 + x - 23 = 19

x = 19 + 23 - 16

x = 26

So, the boy bought 26 stamps.