SOLUTION: Harry drove for 2 hours on the​ freeway, then decreased his speed by 20 miles per hour and drove for 6 more hours on a country road. If his total trip was 352 ​miles,

Algebra ->  Coordinate Systems and Linear Equations  -> Linear Equations and Systems Word Problems -> SOLUTION: Harry drove for 2 hours on the​ freeway, then decreased his speed by 20 miles per hour and drove for 6 more hours on a country road. If his total trip was 352 ​miles,      Log On


   

Question 1085529: Harry drove for
2 hours on the​ freeway, then decreased his speed by 20 miles per hour and drove for 6 more hours on a country road. If his total trip was 352 ​miles, then what was his speed on the​ freeway?
Answer by josgarithmetic(39618) About Me  (Show Source):
You can put this solution on YOUR website!
                   SPEED     TIME        DISTANCE

FREEWAY              r         2           2r

COUNTRY ROAD        r-20       6          6(r-20)

Total                         8            352


highlight_green%282r%2B6%28r-20%29=352%29

r%2B3%28r-20%29=176
4r-60=176
4r=236
highlight%28r=59%29