Question

two truck drivers leave a cafe at the same time traveling in opposite directions. one truck goes 7 mph faster than the other one. after 4 hours they are 404 miles apart. how fast is each truck going?

Answer 1

let x = speed of truck A
x + 7 = truck B <--because 7 mph faster

after 4 hours the distance of truck B would be 4(x+7) according to distance = speed x time

after 4 hours the distance of truck A would be 4x according to distance = speed x time

it says that the distance between them is 404 so let's add

4x + 4(x+7) = 404

4x + 4x + 28 = 404

8x = 404 - 28

8x = 376

solve for x

Answer 2

do you get that?

Answer 3

yes i get it. thanks

Answer 4

<tips hat>