Question 347235
One car Is Going 45mph and the other is going 55.
Take 500 and divide it by 5.
You get 100.Now Take away 10.
You get 90 then you divide it by 2.
You get 45.
That's one of the answers.
Then you add 10 to the 45 and you get 55. 
That's both of the answers.