document.write( "Question 899640: A salesperson purchased an automobile that was advertised as averaging 27 mi/gal in the city and 38 mi/gal on the highway. A recent sales trip that covered 1192 miles required 36 gallons of gasoline. Assuming that the advertised mileage estimates were correct, how many miles were driven in the city? \n" ); document.write( "

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A salesperson purchased an automobile that was advertised as averaging 27 mi/gal in the city and 38 mi/gal on the highway. A recent sales trip that covered 1192 miles required 36 gallons of gasoline. Assuming that the advertised mileage estimates were correct, how many miles were driven in the city?
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document.write( "Let amount of miles driven in the city be D
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document.write( "Then amount of miles driven on highway = 1,192 – D
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document.write( "Equation to be formed:
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document.write( "Miles driven in city, divided by advertised mpg in city, plus miles driven on highway, 
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document.write( "divided by advertised mpg on highway, equals total gallons used. This is:
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document.write( "38D + 27(1,192 – D) = 36(27)(38) ------ Multiplying by LCD, 27(38)
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document.write( "38D + 32,184 – 27D = 36,936
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document.write( "38D – 27D = 36,936 – 32,184
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document.write( "11D = 4,752
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document.write( "D, or distance driven in the city = , or  miles \n" );
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