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Posted by **Monica** on Friday, July 5, 2013 at 6:09pm.

- math -
**Kuai**, Friday, July 5, 2013 at 8:41pmx + x + 13 =460/4

2x + 13 = 115

2x + 13 -13 = 115. -13

2x = 102

2x/2 = 102/2

x = 51

x + 13

= 64

- math -
**Reiny**, Friday, July 5, 2013 at 8:57pmdefine your variables:

let the rate of the the slower car be x mph

then the rate of the faster car is x+13 mph

They both drive for 4 hours

distance covered by slower car = 4x

distance covered by faster car = 4(x+13)

4x + 4(x+13) = 460

8x 408

x = 51

slower car went 51 mph

faster car went 64 mph

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