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)![]() ![]() You can put this solution on YOUR website! 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. \n" ); document.write( " |