Question

За 3 корочки хлеба и 2 кружки молока надо заплатить 20 монет.Сколько стоит одна корочка хлеба,если она дешевле одной кружки молока на 5 монет?

Answer 1

Пусть x-стоимость одной корочки хлеба, тогда x+5- стоимость одной кружки молока.
составляем уравнение: 3x+2*(x+5)=20 и решаем!
3x+2x+10=20
5x=20-10
5x=10
x=10/5
x=2(монеты) стоит одна корочка хлеба

Answer 2

Calculation of the Cost of Bread and Milk

To calculate the cost of one loaf of bread, we can set up a system of equations using the given information. Let's assume the cost of one loaf of bread is represented by x and the cost of one cup of milk is represented by y.

From the given information, we know that: - 3 loaves of bread and 2 cups of milk cost a total of 20 coins.

Using this information, we can set up the following equations:

Equation 1: 3x + 2y = 20

We also know that one loaf of bread is cheaper than one cup of milk by 5 coins. This can be represented by the equation:

Equation 2: x = y - 5

To solve this system of equations, we can substitute Equation 2 into Equation 1:

3(y - 5) + 2y = 20

Simplifying the equation:

3y - 15 + 2y = 20 5y - 15 = 20 5y = 35 y = 7

Now that we have the value of y, we can substitute it back into Equation 2 to find the value of x:

x = 7 - 5 x = 2

Therefore, one loaf of bread costs 2 coins.

Answer: One loaf of bread costs 2 coins.