document.write( "Question 976631: 10 years ago man's age was6 times the sge of his son.12years later,the age of the son will be 27 years.what is the persent age of the father? \n" ); document.write( "

Algebra.Com's Answer #854476 by ikleyn(53879) $\"\"$ $\"About$

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\n" ); document.write( "10 years ago man's age was 6 times the age of his son. 12 years later, the age of the son will be 27 years.
\n" ); document.write( "what is the present age of the father?
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\n" ); document.write( "\n" ); document.write( "        The solution in the post by @lwsshak3, giving the answer 100 years for the father's age, is absurdist and incorrect.
\n" ); document.write( "        The cause of the mistake is that @lwsshak3 lost the logic line on his way.\r
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\n" ); document.write( "\n" ); document.write( "        I came to bring a correct solution.\r
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\n" ); document.write( "\n" ); document.write( "        The problem itself is extremely simple and can be solved mentally, without using equations.\r
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\n" ); document.write( "\n" ); document.write( "        When I was in front of dilemma \"what to provide - a routine algebra solution \r
\n" ); document.write( "\n" ); document.write( "        or a shining mental solution\" - I could not resist and chose a shining mental solution.\r
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document.write( "The problem says \"12 years later, the age of the son will be 27 years.\"\r\n" );
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document.write( "This means that the current age of the son is 27-12 = 15 years.\r\n" );
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document.write( "Hence, 10 years ago the son was 15-10 = 5 years old.\r\n" );
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document.write( "At that time, the father's age was 6 times the sun's age, i.e. 6*5 = 30 years.\r\n" );
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document.write( "Hence, the present age of the father is 30 + 10 = 40 years.\r\n" );
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document.write( "ANSWER.  The present age of the father is 40 years.\r\n" );
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\n" ); document.write( "\n" ); document.write( "Solved correctly in the form accessible for a 4-th grade student
\n" ); document.write( "to teach him to build a logic line and to keep it firmly.\r
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\n" ); document.write( "\n" ); document.write( "It is the way, how a responsible teacher should teach,
\n" ); document.write( "if he wants the seeds he sowed produce right shoots.\r
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\n" ); document.write( "\n" ); document.write( "I said earlier in one of my posts that the method which @lwsshak3 regularly uses is a computer code.
\n" ); document.write( "This problem, solved incorrectly by @lwsshak3, remarkably confirms this my hypothesis/observation.
\n" ); document.write( "@lwsshak3 made a rude OBVIOUS error, but yet he did not even waver, showing total absence of a normal human reaction.\r
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\n" ); document.write( "\n" ); document.write( "It is why such \"teachers\"/\"tutors\" are dangerous participants of an education process -
\n" ); document.write( "because they have no built-in function of self-checking,
\n" ); document.write( "as well as they have no feeling of responsibility for their production.
\n" ); document.write( "Their only goal is to occupy as much territory as possible.\r
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\n" ); document.write( "\n" ); document.write( "It is just as if sappers were laying mines in the path of their own army's advance.\r
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