Question
Ivan and Xuan left Town C for Town D at the same time. When Ivan reached Town D in 5 hours, Xuan had only completed 57 of the distance between the two towns. Xuan's speed was 18 km/h slower than Ivan. What was Ivan's speed?
5 m

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Ivan and Xuan left Town C for Town D at the same time. When Ivan reached Town D in 5 hours, Xuan had only completed 57 of the distance between the two towns. Xuan's speed was 18 km/h slower than Ivan. What was Ivan's speed?