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OpenStudy (anonymous):
john drove 450 ml. in 8 hrs. hr drove 50 mph on the highway and 60mph on the turnpike. how many hrs did he drive on the turnpike?
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OpenStudy (anonymous):
50x + 60(8-x) = 450 50x + 480 - 60x = 450 -10x +480-480 = 450-480 -10x /-10 = -30/-10 x=3 3 hours on the highway, 8-3=5 hours on the turnpike
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