Question 901577
Kent drives his Mazda 114 miles 

Dave drives his Nissan 100 miles. 

both take same time

Dave speed = x
Kent speed = (x+7)

t=d/r

114/(x+7)= 100/x

114x=100(x+7)

114x=100x+700

114x-100x=700

14x=700
/4
x= 50 mph

Dave's speed = 50 mph
Kent's speed = 57 mph