Question

Решите задачу как уравнение. На первой автостоянке в 2 раза машин больше, чем на второй, а на третьей стоянке на 15 машин больше, чем на второй. Всего на трёх автостоянках было 135 машин. Сколько машин стояло на третьей автостоянке?

Answer 1

Ответ:

Пошаговое объяснение:

на второй х

на первой 2х

на третей х+15

135=х+2х+х+15 ,120=4х ,х=120÷4=30

30+15=45 на третьей

Answer 2

Ответ:

пусть на второй х

на первой тогда 2х

на третьей х+15

итог:

х+2х+х+15=4х+ 15=135

4х=135-15

4х=120

х=40

х+15=40+15=55

Пошаговое объяснение:

Answer 3

Problem Analysis

To solve this problem, we need to find the number of cars on the third parking lot. We are given the following information: - The number of cars on the first parking lot is twice the number of cars on the second parking lot. - The number of cars on the third parking lot is 15 more than the number of cars on the second parking lot. - The total number of cars on the three parking lots is 135.

Let's assign variables to represent the number of cars on each parking lot: - Let's call the number of cars on the second parking lot x. - The number of cars on the first parking lot is twice the number on the second parking lot, so it is 2x. - The number of cars on the third parking lot is 15 more than the number on the second parking lot, so it is x + 15.

We can now set up an equation to represent the total number of cars on the three parking lots: x + 2x + (x + 15) = 135

Solving the Equation

To solve the equation, we combine like terms and solve for x:

4x + 15 = 135

Subtract 15 from both sides of the equation:

4x = 120

Divide both sides of the equation by 4:

x = 30

Answer

The number of cars on the third parking lot is x + 15, which is 30 + 15 = 45.

Therefore, there were 45 cars on the third parking lot.