It takes lucas 3 hours to cycle from his home to his friend's village. but if he travels 5 mph slower, it will take him 1.5 hours longer. how far is the friend's village from lucas' house?

a teacher has two students, one two times as old as the other. the teacher is five times as old as the older student, and in 5 years she will be five times as old as her younger student. find the teacher’s present age.

solve both correctly, and the answer is not 22.5 miles ( for both). you, if you solve both of them correctly and show your work, you get