Posted by Anonymous on Monday, November 28, 2011 at 2:28am.
a freight train leaves detroit traveling east at a speed of 65mph. one hour later, a passanger train leaves traveling wst a 85mph. how long will it take for the trains to have traveled the sam distance?
a + b + c = 8
a + b = c - 16
b = c + 8
so
c - 16 + c = 8
2 c = 24
c = 12
b = c + 8 = 20
a + 20 + 12 = 8
a + 32 = 8
a = -24
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