document.write( "Question 1161109: one river is 2854 km longer than a second river. the sum of the length of these rivers is 11,302 km what is the length of each river \n" ); document.write( "

Algebra.Com's Answer #784577 by ikleyn(52794) $\"\"$ $\"About$

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document.write( "If you just know what is the systems of equations, then you can write, based on the condition\r\n" );
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document.write( "    x + y = 11302     (1)\r\n" );
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document.write( "    x - y =  2854     (2)\r\n" );
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document.write( "Now add the equations, and you will get\r\n" );
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document.write( "    2x    = 11302 + 2854 = 14156;  hence,  x = 14156/2 = 7078.\r\n" );
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document.write( "ANSWER.  The longer river length is  7078 km;  The other river is  7078 - 2854 = 4224 km.\r\n" );
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\n" ); document.write( "\n" ); document.write( "If you don't know what is the system of equations, you may solve the problem by different way.\r
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document.write( "Longer river length + other river length = 11302\r\n" );
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document.write( "    x               +    (x - 2854)      = 11302\r\n" );
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document.write( "    2x                                   = 11302 + 2854 = 14156\r\n" );
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document.write( "     x                                                  = 14156/2 = 7078 km\r\n" );
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document.write( "obtaining the same answer.\r\n" );
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\n" ); document.write( "\n" ); document.write( "Solved by two ways, to provide you the best knowledge.\r
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\n" ); document.write( "\n" ); document.write( "Regarding the method of solution with system of equation, know that this system is SIMPLEST of this kind.\r
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\n" ); document.write( "\n" ); document.write( "To gain an experience solving such systems (and such problems), see the lesson\r
\n" ); document.write( "\n" ); document.write( " - Word problems that lead to a simple system of two equations in two unknowns \r
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