so he traveled 54 miles with bus, 54 miles with bike the time it took was 3 hours 45 minutes.

the bus was twice as fast (or took half as long) so multiply 3.75 with 2/3 (as in two thirds) which gives 2.5 unless my head got that wrong. and then devide 54 miles by 2.5 and you get how fast he was riding his bike. (21.6mph I think)

Edit: as you can see you were right thinking about X and 2X (which is how I devided by 3 then multiplied by 2 which is 2/3)

good god, you are right man, thanks. now i can finally leave distance and time problems away to make way for mixing problems. god knows that my school had piss poor math teachers, and spanish teachers, and computer teachers, pretty much all teachers.

anyways, since i already gave you a truckload full of guiness (remember that, when i mistook you for a

not-a-dude. somehow up until now my little honduran brain cannot fully compute your avvy as a dude-avvy)

anyways, i can change the beer if you want