document.write( "Question 1101301: Kathy is seven years older than bill. Sally is five years younger than Kathy. The sum of their ages is 45. How old is each child? \n" ); document.write( "

Algebra.Com's Answer #715934 by ikleyn(52817) $\"\"$ $\"About$

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document.write( "Kathy + Bill + Sally       = 45\r\n" );
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document.write( "K      + B    + S          = 45\r\n" );
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document.write( "(B+7)  + B     + ((B+7)-5) = 45\r\n" );
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document.write( "=================>\r\n" );
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document.write( "3B + 7 + 7 - 5 = 45\r\n" );
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document.write( "3B + 9 = 45  ====>  3B = 45 - 9 = 36  ====>  B=  = 12.\r\n" );
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document.write( "Answer.  Bill is 12 yeras old. Kathy is b+7 = 12+7 = 19 years,  Sally is K-5 = 19-5 = 14 years old.\r\n" );
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document.write( "Check.   12 + 19 + 14 = 45.   ! Correct !\r\n" );
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