document.write( "Question 1088814: The average age of a family of eight is 30 years. The average of six children in the family is 9 years. If the mother is four years younger than the father, calculate the age of the father. \n" ); document.write( "

Algebra.Com's Answer #703118 by ikleyn(52803) $\"\"$ $\"About$

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document.write( "1.  First step is to find the total age of all members of the family.\r\n" );
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document.write( "    It is 30*8 = 240 years.\r\n" );
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document.write( "2.  Second step is to find the total age of all children.\r\n" );
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document.write( "    It is 6*9 = 54.\r\n" );
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document.write( "3.  Now yo can calculate the total age of parents.\r\n" );
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document.write( "    It is 240 - 54 = 186.\r\n" );
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document.write( "4.  \"the mother is four years younger than the father\":  M = F - 4.\r\n" );
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document.write( "5.  From n.3, M + F = 186.\r\n" );
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document.write( "    Substitute M = F - 4 from n.4.  You will get\r\n" );
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document.write( "    (F-4) + F = 186,\r\n" );
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document.write( "    2F - 4 = 186  ====>  2F = 190  ====>  F =  = 95 Years.\r\n" );
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document.write( "Answer. Father is 95 years old.\r\n" );
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\n" ); document.write( "\n" ); document.write( "My opinion is that this condition is absurd. Nonsense, in other words.\r
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