Question

За 2 пачки молока и 1 пачку творога отдали 94р,а за 2 пачки творога и 1 пачку молока 80р.На сколько 1 пачка молока дороже 1 пачки творога? Помогите,сижу решить не могу брату,голова не варит,или я подзабывать стала(

Answer 1

М- молоко, Т - творог

получим два уравнения

2М+1Т=94

2Т+1М=80

 

используя второе уравнение вычислим 1М= 80-2Т

подставим это уравнение в первое:

2*(80-2Т)+1Т=94

160-3Т=94

Т=22 рубля

М=80-2*22=36 рублей

 

Ответ: Пачка молока стоит 36 рублей, пачка творога 22 рубля

 

 

 

Answer 2

Calculating the Price Difference Between Milk and Cottage Cheese

To solve this problem, we can set up a system of equations based on the given information.

Let's assume: - The cost of 1 pack of milk is x rubles. - The cost of 1 pack of cottage cheese is y rubles.

From the given information, we have the following equations: 1. 2x + y = 94 (for 2 packs of milk and 1 pack of cottage cheese costing 94 rubles) 2. 2y + x = 80 (for 2 packs of cottage cheese and 1 pack of milk costing 80 rubles)

Solving the System of Equations

We can solve this system of equations to find the values of x and y.

Subtracting the second equation from the first equation: - 2x + y - (2y + x) = 94 - 80 - 2x + y - 2y - x = 14 - x - y = 14 (Equation 3)

Adding Equation 2 and Equation 3: - 2y + x + x - y = 80 + 14 - 2x + 2y = 94 - x + y = 47 (Equation 4)

Now, we have a new equation (Equation 4) representing the sum of the costs of 1 pack of milk and 1 pack of cottage cheese.

Calculating the Price Difference

To find the price difference between 1 pack of milk and 1 pack of cottage cheese, we can subtract the cost of 1 pack of cottage cheese from the cost of 1 pack of milk: - x - y = 47 - 33 - x - y = 33

Therefore, 1 pack of milk is 33 rubles more expensive than 1 pack of cottage cheese.

I hope this helps! If you have any other questions or need further assistance, feel free to ask.