document.write( "Question 930814: The sum of the ages of the two brothers is 20.In five years, one is twice the other. Find the present ages of the two brothers \n" ); document.write( "
Algebra.Com's Answer #567821 by ptfile(81)\"\" \"About 
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x = the age of the older brother
\n" ); document.write( "y = the age of the younger brother\r
\n" ); document.write( "\n" ); document.write( "The sum of the ages of the two brothers is 20.
\n" ); document.write( "x+y=20
\n" ); document.write( " y=20-x\r
\n" ); document.write( "\n" ); document.write( "In five years, one is twice the other.
\n" ); document.write( "x+5=2(y+5)
\n" ); document.write( "x+5=2(20-x+5)
\n" ); document.write( "x+5=40-2x+10
\n" ); document.write( "x+5=50-2x
\n" ); document.write( " 3x=45
\n" ); document.write( " x=15
\n" ); document.write( " y=5\r
\n" ); document.write( "\n" ); document.write( "The older brother's age is 15 years old while the younger brother's age is 5 years old.
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