Question

Купили 12 красных и 18 синих мячей по одинаковой цене. за красные заплатили на240 рублей меньше,чем за синие. сколько заплатили рублей за всю покупку? "

Answer 1

1)18-12=6(мяч.)-разница кол-во мячей.
2)240:6=40(руб.)-за один мяч.
3)18+12=30(мяч.)-всего.
4)30*40=1200(руб.)-всего заплатили.
Ответ:всего заплатили 1200 руб.

Answer 2

Calculation of the Total Cost

To calculate the total cost of the purchase, we need to determine the price of each ball and then multiply it by the total number of balls.

Let's assume the price of each ball is x rubles.

The number of red balls is 12, and the number of blue balls is 18.

According to the given information, the price of the red balls is 240 rubles less than the price of the blue balls.

Therefore, we can set up the following equation:

12x = 18x - 240

Simplifying the equation:

6x = 240

Dividing both sides of the equation by 6:

x = 40

So, the price of each ball is 40 rubles.

To find the total cost of the purchase, we multiply the price of each ball by the total number of balls:

Total cost = (12 + 18) * 40 = 30 * 40 = 1200 rubles.

Therefore, the total cost of the purchase is 1200 rubles.