Question

Купили 9 кг картоплі та 6 кг цибулі , заплативши за всю покупку 87 грн . скільки коштує 1 кг картоплі , якщо ціна 1 кг цибулі дорівнює 7 грн.

Answer 1

6х7=42(столько стоит 6 кг цибули)

87-42=45(столько стоит 9 кг картопли)
45:9=5 (грн)
Ответ:1кг картопли стоит 5 грн

Answer 2

6 умн. на 7 = 42 (кг) цибуля
87-42=45(кг) картопля усього
45 : 9 = 5 (кг) 1 кг кар.
ответ:5 грн. стоит 1 кг кар.

Answer 3

Calculation of the Cost of Potatoes

To calculate the cost of 1 kg of potatoes, we need to determine the total cost of the potatoes and then divide it by the total weight of the potatoes.

Given that the total weight of potatoes is 9 kg and the total cost of the purchase is 87 UAH, we can set up the following equation:

9 kg * cost per kg of potatoes + 6 kg * cost per kg of onions = 87 UAH.

We also know that the cost per kg of onions is 7 UAH, as stated in the question.

Let's solve the equation to find the cost per kg of potatoes.

9 kg * cost per kg of potatoes + 6 kg * 7 UAH = 87 UAH

9 kg * cost per kg of potatoes = 87 UAH - 6 kg * 7 UAH

9 kg * cost per kg of potatoes = 87 UAH - 42 UAH

9 kg * cost per kg of potatoes = 45 UAH

Now, we can calculate the cost per kg of potatoes by dividing both sides of the equation by 9 kg:

Cost per kg of potatoes = 45 UAH / 9 kg = 5 UAH/kg.

Therefore, the cost of 1 kg of potatoes is 5 UAH.