document.write( "Question 369484: the sum of william's age and fred's age is 20 years. William's age 1 year from now will be 9 times fred's age 1 year ago. Find the present age of each \n" ); document.write( "
Algebra.Com's Answer #263302 by amoresroy(361) You can put this solution on YOUR website! the sum of william's age and fred's age is 20 years. William's age 1 year from now will be 9 times fred's age 1 year ago. Find the present age of each\r \n" ); document.write( "\n" ); document.write( "Let W = the present age of William \n" ); document.write( " F = the present age of Fred\r \n" ); document.write( "\n" ); document.write( "1st equation \n" ); document.write( "W+F = 20 \n" ); document.write( " W = 20 - F\r \n" ); document.write( "\n" ); document.write( "2nd equation \n" ); document.write( "W + 1= 9(F-1) \n" ); document.write( "since W = 20-F in 1st equation \n" ); document.write( "The 2nd equation becomes \n" ); document.write( "(20-F) + 1 = 9(F-1) \n" ); document.write( "20-F + 1 = 9F - 9 \n" ); document.write( " 10F= 30 \n" ); document.write( " F = 3\r \n" ); document.write( "\n" ); document.write( " W = 20 - 3 \n" ); document.write( " = 17 \n" ); document.write( " |