document.write( "Question 975720: Please help me solve this word problem:\r
\n" ); document.write( "\n" ); document.write( "Jake is one year older than Daryl. Twice the product of their ages is 60 yrs. more than the product of their ages 5 yrs. from now. How old is each? \n" ); document.write( "
Algebra.Com's Answer #597402 by AnlytcPhil(1806)\"\" \"About 
You can put this solution on YOUR website!
Jake is one year older than Daryl.
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document.write( "J = D+1\r\n" );
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\n" ); document.write( "Twice the product of their ages is 60 yrs. more than the product of their ages
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document.write( "2JD = (J+5)(D+5) + 60\r\n" );
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document.write( "So we have this system:\r\n" );
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document.write( "\"system%28J+=+D%2B1%2C+2JD+=+%28J%2B5%29%28D%2B5%29+%2B+60%29\"\r\n" );
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document.write( "\"2JD+=+%28J%2B5%29%28D%2B5%29+%2B+60\"\r\n" );
document.write( "\"2JD+=+JD%2B5J%2B5D%2B25%2B60\"\r\n" );
document.write( "\"JD+=+5J%2B5D%2B85\"\r\n" );
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document.write( "Substituting J = D+1\r\n" );
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document.write( "\"JD+=+5%28D%2B1%29%2B5D%2B85\"\r\n" );
document.write( "\"%28D%2B1%29D+=+5D%2B5%2B5D%2B85\"\r\n" );
document.write( "\"D%5E2%2BD+=+10D%2B90\"\r\n" );
document.write( "\"D%5E2-9D-90=0\"\r\n" );
document.write( "\"%28D%2B6%29%28D-15%29=0\"\r\n" );
document.write( "D=-6;  D=15\r\n" );
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document.write( "Ignore the negative answer,\r\n" );
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document.write( "Daryl is 15,\r\n" );
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\n" ); document.write( "Jake is one year older than Daryl.
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document.write( "Jake is 16.\r\n" );
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document.write( "Edwin
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