document.write( "Question 1043687: 10a + 4b = 28
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Algebra.Com's Answer #658840 by Edwin McCravy(20056)\"\" \"About 
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document.write( "10a +  4b = 28\r\n" );
document.write( " 6a + 18b = 48\r\n" );
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document.write( "Divide the first one through by 2\r\n" );
document.write( "Divide the second one through by 6\r\n" );
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document.write( "5a + 2b = 14\r\n" );
document.write( " a + 3b =  8\r\n" );
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document.write( "Solve the second for a:\r\n" );
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document.write( "      a = 8 - 3b\r\n" );
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document.write( "Substitute (8 - 3b) for a in the first:\r\n" );
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document.write( "       5a + 2b = 14\r\n" );
document.write( "5(8 - 3b) + 2b = 14\r\n" );
document.write( " 40 - 15b + 2b = 14\r\n" );
document.write( "      40 - 13b = 14\r\n" );
document.write( "          -13b = -26\r\n" );
document.write( "             b = 2\r\n" );
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document.write( "Substitute (2) for b in \r\n" );
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document.write( "             a = 8 - 3b\r\n" );
document.write( "             a = 8 - 3(2)\r\n" );
document.write( "             a = 8 - 6\r\n" );
document.write( "             a = 2\r\n" );
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document.write( "Edwin

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