document.write( "Question 763535: Frank is 15 years younger then John. In 5 years John will be twice as old as Frank. How old will Frank be in four years? \n" ); document.write( "

Algebra.Com's Answer #464860 by Edwin McCravy(20059) $\"\"$ $\"About$

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Frank is 15 years younger then John.
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document.write( "F = J - 15\r\n" );
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\n" ); document.write( "In 5 years John will be twice as old as Frank.
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document.write( "J + 5 = 2(F + 5)\r\n" );
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document.write( "That gives us this system of equations:\r\n" );
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document.write( "F = J - 15\r\n" );
document.write( "J + 5 = 2(F + 5)\r\n" );
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document.write( "We solve that and get\r\n" );
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document.write( "F = 10, J = 25\r\n" );
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\n" ); document.write( "How old will Frank be in four years?
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document.write( "What is F + 4 ?\r\n" );
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document.write( "F + 4 = 10 + 4 = 14.\r\n" );
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document.write( "Edwin

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