document.write( "Question 1200692: John is five times as old as his brother. The difference between their age is twelve years. What is John age? \n" ); document.write( "
Algebra.Com's Answer #834970 by MathTherapy(10555)![]() ![]() You can put this solution on YOUR website! \r\n" ); document.write( "John is five times as old as his brother. The difference between their age is twelve years. What is John age?\r\n" ); document.write( "\r\n" ); document.write( "Let John's and the brother's ages be J and B, respectively\r\n" ); document.write( "Then we get: J = 5B ----- eq (i)\r\n" ); document.write( "As John is older, we also get: J - B = 12___J - 12 = B ----- eq (ii)\r\n" ); document.write( " J = 5(J - 12) ----- Substituting J - 12 for B in eq (i)\r\n" ); document.write( " J = 5J - 60\r\n" ); document.write( " J - 5J = - 60\r\n" ); document.write( " - 4J = - 60\r\n" ); document.write( "John's age or\n" ); document.write( " |