document.write( "Question 936903: Aby and his brother Ben are teenagers. Ben is 3 years younger than Aby and the GCF of their age is 3. how old is Ben? \n" ); document.write( "

Algebra.Com's Answer #570370 by Edwin McCravy(20056) $\"\"$ $\"About$

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Aby and his brother Ben are teenagers.
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document.write( "13 ≤ A ≤ 19,   13 ≤ B ≤ 19\r\n" );
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\n" ); document.write( "Ben is 3 years younger than Aby
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document.write( "B = A-3, so we substitute A-3 for B and\r\n" );
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document.write( "13 ≤ B ≤ 19 becomes\r\n" );
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document.write( "13 ≤ A-3 ≤ 19\r\n" );
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document.write( "We add 3 to all three sides:\r\n" );
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document.write( "16 ≤ A ≤ 22, but since A ≤ 19,\r\n" );
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document.write( "16 ≤ A ≤ 19\r\n" );
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\n" ); document.write( "the GCF of their age is 3
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document.write( "So A is a multiple of 3 and the only multiple of 3\r\n" );
document.write( "between 16 and 19 is 18, so \r\n" );
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document.write( "A = 18 and B = A-3 = 18-3 = 15.\r\n" );
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document.write( "Edwin

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