document.write( "Question 1074239: please help me write an absolute value equation that has 9 and 21 as its solution \n" ); document.write( "

Algebra.Com's Answer #688958 by Edwin McCravy(20060) $\"\"$ $\"About$

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document.write( "Suppose the equation is\r\n" );
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document.write( "where B is non-negative.\r\n" );
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document.write( "Then we solve it as we would if we knew\r\n" );
document.write( "the values of A and B:\r\n" );
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document.write( "x+A = B;   x+A = -B  \r\n" );
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document.write( "x = B-A;   x = -B-A\r\n" );
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document.write( "So the solutions are B-A and -B-A\r\n" );
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document.write( "If we choose B-A to be the 21 and -B-A to be the 9,\r\n" );
document.write( "we have this system of equations\r\n" );
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document.write( "Solve that and get B = 6 and A = -15\r\n" );
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document.write( "So the equation\r\n" );
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document.write( "becomes:\r\n" );
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document.write( "Edwin

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