<PRE><B>Question 1058176</B>
100 miles at x mph, and the time was 100/x hours. Speed*time=distance.
135 miles at (x-5) mph, and the time was 135/(x-5). 
Those two add to 5.
(100/x)+(135/(x-5)=5
multiply everything by x*(x-5)
100(x-5)+135x=5x^2-25x
100x-500+135x=5x^2-25x
5x^2-260x+500=0
x^2-52x+100=0, dividing everything by 5
(x-2)(x-50)=0
x=2,50, only 50 makes sense
Truck went 50 mph for the first two hours ANSWER
It went 45 mph for the next 3 hours, or 135 miles.
</PRE>