=Solve the quoting problem by using the fractional equation A. The distance between B and a is 40km. A and B start from a to B by bike at the same time. A's speed is 2km faster than B's. When a goes 4km away from B, it is changed to walking, and the speed is reduced by 8km per hour. As a result, a and B arrive at B at the same time to find the speed of a and B Sorry for the wrong words=

=Solve the quoting problem by using the fractional equation A. The distance between B and a is 40km. A and B start from a to B by bike at the same time. A's speed is 2km faster than B's. When a goes 4km away from B, it is changed to walking, and the speed is reduced by 8km per hour. As a result, a and B arrive at B at the same time to find the speed of a and B Sorry for the wrong words=

Let a and B be X-2
Set the time to t
T = 36 / x + 4 / X-8
Time used by B T = 40 / X-2
36 / x + 4 / X-8 = 40 / X-2 to solve the equation