Let's assume that Jean drove x km.
According to the given information, Marc drove twice as much as Jean, so Marc drove 2x km.
Michelle drove 100km more than Marc, so Michelle drove 2x + 100 km.
The total distance driven by all three is the sum of the distances driven by each individual:
Distance driven by Jean: x km
Distance driven by Marc: 2x km
Distance driven by Michelle: 2x + 100 km
The total distance driven by all three is given as not exceeding 1350km:
x + 2x + 2x + 100 = 1350
Simplifying the inequality:
5x + 100 = 1350
Subtracting 100 from both sides:
5x = 1250
Dividing both sides by 5:
x = 250
Since x represents the distance driven by Jean, the value for x is 250 km.
Answer: Jean drove 250 km.