document.write( "Question 1102065: Brian is 3 times older than Sydney, the sum of their ages is 8. How old is Brian? \n" ); document.write( "

Algebra.Com's Answer #716706 by ikleyn(52864) $\"\"$ $\"About$

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\n" ); document.write( "Brian is 3 times $\"highlight%28cross%28older%29%29\"$ $\"highlight%28cross%28than%29%29\"$ as old as Sydney, the sum of their ages is 8. How old is Brian?
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\n" ); document.write( "\n" ); document.write( "Answer. Brian is 6 years. 2 + 6 = 8 (mental solution, 2 seconds).\r
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document.write( "Sydney + Brian = 8\r\n" );
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document.write( "S      + B     = 8\r\n" );
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document.write( "S      + 3S    = 8\r\n" );
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document.write( "4S = 8  ====>  S =  = 2;  then  B = 3*2 = 6.\r\n" );
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