document.write( "Question 1149621: Josef's father is seven times as old as he is. One year ago, he was nine times as old as Josef. Find their age \n" ); document.write( "

Algebra.Com's Answer #770967 by ikleyn(52788) $\"\"$ $\"About$

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document.write( "Let x be the Joseph's age.\r\n" );
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document.write( "Then the father's age is 7x years.\r\n" );
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document.write( "One age ago \r\n" );
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document.write( "    7x-1 = 9*(x-1)\r\n" );
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document.write( "Simplify and solve\r\n" );
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document.write( "    7x - 1 = 9x - 9\r\n" );
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document.write( "    9 - 1 = 9x - 7x\r\n" );
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document.write( "    8 = 2x.\r\n" );
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document.write( "    x = 8/2 = 4.\r\n" );
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document.write( "ANSWER.  4 years and 28 years.\r\n" );
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