document.write( "Question 1174116: One morning, Justin drove 3 hours before stopping to eat lunch at Chick-fil-A. After lunch, he increased his speed by 10 mph. If he completed a 450-mile trip in 8 hours of driving time, how fast did he drive in the morning? \n" ); document.write( "
Algebra.Com's Answer #799506 by ewatrrr(24785)\"\" \"About 
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document.write( "Hi,\r\n" );
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document.write( "Justin drove 3 hours before stopping & then increased his speed by 10 mph\r\n" );
document.write( "he completed a 450-mile trip in 8 hours of driving time\r\n" );
document.write( " how fast did he drive in the morning?\r\n" );
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document.write( "Let x be the morning speed.  D = rt\r\n" );
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document.write( " 3x + 5(x+10) = 450mi\r\n" );
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document.write( "  8x - 400mi\r\n" );
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document.write( "   x = 50 mi/hr was Justin's morning speed\r\n" );
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