This equation can't be used to calculate the fifth grade problem. - Training Enrollment Network

This equation can't be used to calculate the fifth grade problem.

The sum of two people's speeds: 4.5/0.5 = 9 km/h.

Speed difference between two people: 4.5/3 =1.5 km/h.

Xiao Li's speed: (9+1.5)/2 = 5.25km/h.

Xiao Wang's speed: (9-1.5)/2 = 3.75km/h.

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