The train covered 145 km in three hours. How many kilometers did she drive in each of these hours

The train covered 145 km in three hours. How many kilometers did she drive in each of these hours, if in the first two hours she covered 98 kilometers? and in the third hour 3 km less than the second?

Let’s denote by the unknown variable x km – the train passed in the first hour,
98 – х km – the electric train passed in the second hour,
98 – x – 3 = 95 – x km – the train passed in the third hour.
According to the problem, the train covered 145 km in just 3 hours. Let’s make the equation:
x + 98 – x + 95 – x = 145,
193 – x = 145,
x = 48 km – the train passed in the first hour,
98 – 48 = 50 km – the train passed in the second hour,
95 – 48 = 47 km – the train passed in the third hour.