Question 1131903
A drives at 65 mph and goes 65x miles in x hours
D drives at 25 mph and goes 25(x-1) miles in x-1 hours
they go apart at 65x+25x-25 miles per hour and that equals 425 miles
so 90x=450 miles
x=5 hours for A  325 miles
x-1=4 hours for D 100 miles ANSWER