Question

Решите уровнение с объяснением и проверкой. x-90=20; y+20=90; 90-c=20: К какому из уровнений Лика придумала задачу? Какую величину она обозначила буквой? Почему? В корзине лежали фрукты. Когда из неё достали 90 апельсинов, то в ней осталось ещё 20 других фруктов. Сколько фруктов лежало в корзине первоначально?

Answer 1

В корзине первоначально лежало 110 фруктов№ она использовала первое уравнение? так как первоначальное количество х, отняли 90, получили 20.
2) у=70, 70+20=90
3) с= 70, 90-70= 20

Answer 2

Solving the Equations

To solve the given equations, let's go through each one step by step:

1. Equation 1: x - 90 = 20 To solve for x, we need to isolate the variable on one side of the equation. We can do this by adding 90 to both sides of the equation: x - 90 + 90 = 20 + 90 Simplifying, we get: x = 110

2. Equation 2: y + 20 = 90 To solve for y, we need to isolate the variable on one side of the equation. We can do this by subtracting 20 from both sides of the equation: y + 20 - 20 = 90 - 20 Simplifying, we get: y = 70

3. Equation 3: 90 - c = 20 To solve for c, we need to isolate the variable on one side of the equation. We can do this by subtracting 90 from both sides of the equation: 90 - c - 90 = 20 - 90 Simplifying, we get: -c = -70 Multiplying both sides of the equation by -1 to solve for c, we get: c = 70

The Problem and the Unknown Quantity

The problem described in the question involves a basket of fruits. Initially, there were some fruits in the basket. When 90 oranges were taken out of the basket, there were still 20 other fruits left. The question asks how many fruits were initially in the basket.

To represent the unknown quantity of fruits initially in the basket, the problem uses the variable "c." The equation 90 - c = 20 represents the situation where 90 oranges were taken out of the basket, leaving 20 other fruits.

Final Answer

To find the initial number of fruits in the basket, we can solve the equation 90 - c = 20, where c represents the initial number of fruits. From our previous calculations, we found that c = 70. Therefore, there were initially 70 fruits in the basket.

I hope this helps! Let me know if you have any further questions.