document.write( "Question 1125338: Mark is 64 years younger than Chasity. 4 years ago, Chasity's age was 3 times Mark's age. How old is Mark now?
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Algebra.Com's Answer #741648 by ikleyn(52788) $\"\"$ $\"About$

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document.write( "Let M be the Mark's age.\r\n" );
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document.write( "Then the Chasity age is (M+64) years, according to the condition.\r\n" );
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document.write( "4 years ago:\r\n" );
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document.write( "    (M+64) - 4 = 3(M-4)\r\n" );
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document.write( "    M + 60 = 3M - 12\r\n" );
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document.write( "    72 = 3M - M\r\n" );
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document.write( "    72 = 2M  ====>  M = 72/2 = 36.\r\n" );
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document.write( "Answer.  Mark is 36 years now.\r\n" );
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