Question

Аня,Лиза и Артем собирают цветные наклейки у Ани на 20 больше,чем у Лизы и на20 меньше,чем у Артема.А вместе у них 90 наклеек.Сколько у каждого?

Answer 1

Пусть х-кол-во наклеек у  Лизы
Тогда 20+х-кол-во наклеек у Ани,
А (20+х)+20-кол-во у Артема,
Зная,что всего 90 наклеек,составим уравнение
20+20+х+20+х+х=90
60+3х=90
3х=30
х=30:3
х=10(шт.)У Лизы
1)10+20=30(шт.)у Ани
2)30+20=50(шт.)у Артема
Ответ:10,20,50 наклеек

Answer 2

Пусть лизины наклейки будут х, тогда анины- х+20, накдейки Артема- х+20+20. Вместе у них 90 накдеек. Составляем уравнеие.

х+х+20+х+20+20=90
3х+60=90
3х=90-60
3х=30
х=10-наклейки Лизы
наклейки Ани- 30
Наклейки Артема-50

Answer 3

Problem Analysis

We are given that Anya, Lisa, and Artem are collecting colored stickers. Anya has 20 more stickers than Lisa and 20 fewer stickers than Artem. Together, they have a total of 90 stickers. We need to determine how many stickers each person has.

Solution

Let's assume that Lisa has x stickers. According to the given information, Anya has 20 more stickers than Lisa, so Anya has x + 20 stickers. Similarly, Artem has 20 more stickers than Anya, so Artem has (x + 20) + 20 = x + 40 stickers.

The total number of stickers they have is 90, so we can write the equation:

x + (x + 20) + (x + 40) = 90

Simplifying the equation:

3x + 60 = 90

Subtracting 60 from both sides:

3x = 30

Dividing both sides by 3:

x = 10

So, Lisa has 10 stickers, Anya has 10 + 20 = 30 stickers, and Artem has 10 + 40 = 50 stickers.

Therefore, Lisa has 10 stickers, Anya has 30 stickers, and Artem has 50 stickers.

Answer

Lisa has 10 stickers, Anya has 30 stickers, and Artem has 50 stickers.