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)\"\" \"About 
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( "
\n" );