document.write( "Question 1128713: A parking lot has a surface of 720 m^2. Each car occupies an area of 6m^2 and each bus occupies an area of 18m^2\r
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Algebra.Com's Answer #745193 by ikleyn(53763)\"\" \"About 
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document.write( "Let X be the number of cars, and\r\n" );
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document.write( "let Y be the numbers of buses.\r\n" );
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document.write( "Then\r\n" );
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document.write( "6X + 18Y <= 720.\r\n" );
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