document.write( "Question 511708: William, who is twelve years old, is four times as old as his brother. How old will William be when he is twice as old as his brother? \n" ); document.write( "
Algebra.Com's Answer #342377 by oberobic(2304)![]() ![]() ![]() You can put this solution on YOUR website! William = 12 years old \n" ); document.write( "His brother = 12/4 = 3 years old \n" ); document.write( ". \n" ); document.write( "In the future, William will be 12+x years old, and his brother will be 3+x years old, \n" ); document.write( "where 'x' is a number of years. \n" ); document.write( ". \n" ); document.write( "At what point will 12+x = 2(3+x)? \n" ); document.write( ". \n" ); document.write( "12 +x = 2(3 +x) = 6 +2x \n" ); document.write( "-x = -6 \n" ); document.write( "x = 6 \n" ); document.write( ". \n" ); document.write( "Answer: In 6 years, William will be twice as old as his brother. \n" ); document.write( ". \n" ); document.write( "Always check your answer. \n" ); document.write( "12+6 = 18 \n" ); document.write( "3+6 = 9 \n" ); document.write( "18 = 2*9 \n" ); document.write( "Correct \n" ); document.write( ". \n" ); document.write( "Done. \n" ); document.write( " |