In 3 hours, a motorcyclist travels the same distance as a cyclist in 7 hours. The motorcyclist’s speed is 20 km / h higher

In 3 hours, a motorcyclist travels the same distance as a cyclist in 7 hours. The motorcyclist’s speed is 20 km / h higher than the cyclist’s speed. Determine the speed of the cyclist.

Let the cyclist ride X km / h. Then the motorcyclist – X + 20 km / h. Because the distance is the same (you can find it using the formula S = V * t) Let’s make the equation:
(X + 20) * 3 = 7 * X
X + 20 * 3 = 7X
20 * 3 = 7X-X
60 = 6X
X = 60: 6
X = 10
Answer: 10 km / h.