30 minutes =0.5 hours

Then it is 35x (x+0.5) = 45x.

X= 1.75 hours.

And 45×1.75 = 78.75 >; 40

So it is unreasonable to ask questions.

May I ask, how long will it take for the motorcycle to start from place A and the train to start from place B if they start at the same time?

I'll see you in x hours.

45 times = 40+35 times

Connected X=4

See you in four hours.