document.write( "Question 371633: Jack is 5 years older than his sister Mary. The sum of their ages is 37. How old is Jack. Show your work. \n" ); document.write( "
Algebra.Com's Answer #264701 by stanbon(75887)![]() ![]() ![]() You can put this solution on YOUR website! Jack is 5 years older than his sister Mary. The sum of their ages is 37. How old is Jack. Show your work. \n" ); document.write( "------------------- \n" ); document.write( "Equations: \n" ); document.write( "j = m+5 \n" ); document.write( "j+m = 37 \n" ); document.write( "----- \n" ); document.write( "Substitute for \"j\" and solve for \"m\": \n" ); document.write( "m+5 + m = 37 \n" ); document.write( "2m = 32 \n" ); document.write( "m = 16 (Mary's age now) \n" ); document.write( "------ \n" ); document.write( "Since j = m+5, j = 21 (Jack's age now) \n" ); document.write( "========== \n" ); document.write( "Cheers, \n" ); document.write( "Stan H. \n" ); document.write( " |