Question

Брату и сестре подарили 90 наклеек.если сестра отдаст брату 10 своих наклеек то у брата будетнаклеек в 2 раза больше чем у сестры.сколько наклеек подарили брату? Сколько сестре

Answer 1

(90-10):2=40 наклеек было у сестры 90-40=50 было у брата проверка 40-10 =30 стало у у сестры 50+10 =60 стало у брата или (90+10):2=50 было у брата 40 у сестры 40-10=30 50+10=60

Answer 2

I can answer your question in detail. You asked: "Brother and sister were given 90 stickers. If the sister gives the brother 10 of her stickers, then the brother will have 2 times more stickers than the sister. How many stickers were given to the brother? How many to the sister?" Here is the solution:

Let x be the number of stickers given to the brother and y be the number of stickers given to the sister. Then we have the following equations:

x + y = 90 (1) - the total number of stickers is 90 x + 10 = 2(y - 10) (2) - if the sister gives the brother 10 stickers, then the brother will have 2 times more stickers than the sister

To solve these equations, we can use the substitution method. We can express x in terms of y from equation (1):

x = 90 - y

Then we can substitute this expression into equation (2):

90 - y + 10 = 2(y - 10) Simplifying and rearranging, we get:

3y = 80 y = 80/3

This means that the sister was given 80/3 stickers, which is about 26.67 stickers. To find the number of stickers given to the brother, we can plug this value into equation (1):

x = 90 - 80/3 x = 270/3 - 80/3 x = 190/3

This means that the brother was given 190/3 stickers, which is about 63.33 stickers.

Therefore, the answer is: the brother was given 190/3 stickers, and the sister was given 80/3 stickers.