On the highway, a truck is driving at a speed of 42 kilometers per hour. 21 kilometers away from the truck, a car is catching up at a speed of 49 kilometers per hour. A few hours later, it will catch up with the truck on the way? (lie equation)

On the highway, a truck is driving at a speed of 42 kilometers per hour. 21 kilometers away from the truck, a car is catching up at a speed of 49 kilometers per hour. A few hours later, it will catch up with the truck on the way? (lie equation)

If you can catch up with a truck on the way in X hours,
49X-42X=21
The solution is x = 3 (hours)
A: three hours later, the car caught up with the truck on the way

A truck can travel 35km per hour, and the speed of a car is twice that of a truck, 17km less. How many km can a car travel per hour?
Km = km solved by equation

Hello
X km / h
x+17=2*35
x=70-17
x=53
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