document.write( "Question 1178827: Chester drives his car 165 miles and has an average of a certain speed. If the average speed had been 2mph more, he could have traveled 176 miles in the same length of time. What was his average speed? \n" ); document.write( "

Algebra.Com's Answer #808242 by ikleyn(52814) $\"\"$ $\"About$

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document.write( "Let x be his average speed, in miles per hour.\r\n" );
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document.write( "Then the hypothetical speed is (x+2) mph.\r\n" );
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document.write( "From the condition, you have this equation\r\n" );
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document.write( "     = .\r\n" );
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document.write( "To solve it, first cross-multiply; then simplify\r\n" );
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document.write( "    165*(x+2) = 176x\r\n" );
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document.write( "    165x + 165*2 = 176x\r\n" );
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document.write( "    330 = 176x - 165x\r\n" );
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document.write( "    330 = 11x\r\n" );
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document.write( "    x   =  = 30.\r\n" );
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document.write( "ANSWER.  His average speed was  30 mph.\r\n" );
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