document.write( "Question 1158478: Two small planes start from the same point and fly in opposite directions. The first plane is flying 40 mph slower than the second plane. In 3 h, the planes are 870 mi apart. Find the rate of each plane. \n" ); document.write( "

Algebra.Com's Answer #781434 by ikleyn(52776) $\"\"$ $\"About$

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document.write( "If x be the slower speed (in mph), then the faster speed is (x+40) mph,\r\n" );
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document.write( "and you have this simple equation for the total distance\r\n" );
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document.write( "    3*x + 3*(x+40) = 870.\r\n" );
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document.write( "The rest is clear.\r\n" );
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