document.write( "Question 1105954: I am 6 years older than my sister. my brother is 6 years older than i am. the sum of our ages is 72 years. how old is my sister
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Algebra.Com's Answer #720865 by ikleyn(52803) $\"\"$ $\"About$

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document.write( "My age + my brother age + my sister age = 72\r\n" );
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document.write( "  x    + (x+6)          + (x-6)         = 72\r\n" );
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document.write( "==================>  3x = 72  ====>  x =  = 24.\r\n" );
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document.write( "Answer.  My sister is 18 years old.\r\n" );
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