Question 752026
Bert is traveling 15 miles per hour slower than Ernie. Bert can travel 150 miles in the same time it takes Ernie to go 225 miles. Find Bert's speed. 
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Ernie DATA:
distance = 225 miles ; rate = x mph ; time = d/r = 225/x hrs.
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Bert DATA:
distance = 150 miles ; rate = x-15 mph ; time = d/r = 150/(x-15) hrs
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Equation:
time = time
225/x = 150/(x-15)
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225x - 225*15 = 150x
75x = 225*15
x = (1/5)(225)
x = 45 mph (Ernie's rate)
x -15 = 30 mph (Bert's rate)
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Cheers,
Stan H.
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