document.write( "Question 1209753: my brother is 7 years younger than me. Twice my age plus 3 times his age is 99.What are our ages?
\n" ); document.write( "Plz use the singapore model method. I have the answer but can not understand how to show the working out using the bar model.\r
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Algebra.Com's Answer #850135 by ikleyn(52788)\"\" \"About 
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\n" ); document.write( "my brother is 7 years younger than me. Twice my age plus 3 times his age is 99.
\n" ); document.write( "What are our ages? Plz use the singapore model method.
\n" ); document.write( "I have the answer but can not understand how to show the working out using the bar model.
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\n" ); document.write( "\n" ); document.write( "        This problem can be solved MENTALLY, without using any equations,\r
\n" ); document.write( "\n" ); document.write( "        based on common sense ONLY.\r
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document.write( "Mentally, reduce your age by 7 years, to the age of your brother.\r\n" );
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document.write( "Then \"twice my age plus 3 times his age\" will become 99 - 2*7 = 85.\r\n" );
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document.write( "Now this \"twice my age plus 3 times his age\" is the same as 5 times the brother age.\r\n" );
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document.write( "Hence, the brother age is 85/5 = 17 years, and your real age is 7 years more, or 17+7 = 24 years.\r\n" );
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document.write( "ANSWER.  You are  24 years old. Your brother is 17 years old.\r\n" );
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\n" ); document.write( "\n" ); document.write( "Solved mentally, in extremely simple way.\r
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\n" ); document.write( "\n" ); document.write( "I believe that this solution is accessible for a 4-th grade student.\r
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