Question

Реши задачу с помощью уравнения: расстояние между поселком и городом 81 км. Из них Одновременно навстречу друг другу выехали два велосипедиста и встретились через 3 часа скорость велосипедиста выехавшего из города 12 км ч Какова скорость другого велосипедиста? решить надо УРАВНЕНИЕМ​

Answer 1

х- скорость второго велосипедиста

х+12 скорость сближения

(х+12)*3=81

х+12=81;3

х+2=27

х=27-12

х =15 км/ч скорость второго велосипедиста

Answer 2

#### Problem Analysis We are given that the distance between a village and a city is 81 km. Two cyclists start simultaneously from the village and the city and meet each other after 3 hours. The speed of the cyclist who started from the city is 12 km/h. We need to find the speed of the other cyclist. #### Solution Let's assume the speed of the other cyclist is **x** km/h. We can use the formula **distance = speed × time** to create an equation based on the given information. The distance traveled by the cyclist who started from the city is **12 km/h × 3 hours = 36 km**. Since the total distance between the village and the city is 81 km, the distance traveled by the other cyclist can be calculated as **81 km - 36 km = 45 km**. Now we can set up the equation: **distance traveled by the other cyclist = speed of the other cyclist × time** Substituting the values we have: **45 km = x km/h × 3 hours** To find the value of **x**, we can divide both sides of the equation by 3: **45 km / 3 hours = x km/h** Simplifying the equation: **15 km/h = x km/h** Therefore, the speed of the other cyclist is **15 km/h**. #### Answer The speed of the other cyclist is **15 km/h**.