Question

Скорость грузовика составила 5/7 скорости легковой автомашины найдите скорость легковой автомошины если скорость грузовика 22 км/ч меньше скорости легковой автомошины

Answer 1

Х - скорость  легковой машины
5/7х - скорость грузовика
х-5/7х=22
2/7х=22
х=22:2/7
х=22*7/2
х=77 км/ч - скорость легковой
77*5/7=55 км/ч - скорость грузовика 

Answer 2

Calculating the Speed of the Car

To find the speed of the car, we can use the given information that the speed of the truck is 5/7 of the speed of the car and the speed of the truck is 22 km/h less than the speed of the car.

Let's denote the speed of the car as C and the speed of the truck as T.

According to the given information, we have the following equation: T = C - 22 (1) and T = (5/7)C (2)

We can solve these equations to find the speed of the car.

First, we'll substitute the value of T from equation (2) into equation (1): (5/7)C = C - 22

Now, we can solve for C: (5/7)C - C = -22 (5C - 7C) / 7 = -22 -2C / 7 = -22 -2C = -22 * 7 -2C = -154 C = 154 / 2 C = 77

Answer

The speed of the car is 77 km/h.