document.write( "Question 821235: Please help me solve this problem:\r
\n" ); document.write( "\n" ); document.write( "What is a son's age if his mother is twice his age and she is 5 years younger than his father. Added togther, the son, mother and fathers ages add up to 100.\r
\n" ); document.write( "\n" ); document.write( "Thanks and regards
\n" ); document.write( "Steve \n" ); document.write( "
Algebra.Com's Answer #494042 by ankor@dixie-net.com(22740)\"\" \"About 
You can put this solution on YOUR website!
Let s = son's age
\n" ); document.write( "Let m = mother's age
\n" ); document.write( "let f = father's age
\n" ); document.write( ":
\n" ); document.write( "Write an equation for each statement; arrange equations to get it in terms of m:
\n" ); document.write( ":
\n" ); document.write( "What is a son's age if his mother is twice his age
\n" ); document.write( "m = 2s
\n" ); document.write( "divide both sides by 2
\n" ); document.write( "s = .5 m
\n" ); document.write( ":
\n" ); document.write( " and she is 5 years younger than his father.
\n" ); document.write( "m = f-5
\n" ); document.write( "add 5 to both sides
\n" ); document.write( "f = m+5\r
\n" ); document.write( "\n" ); document.write( ":
\n" ); document.write( " Added together, the son, mother and fathers ages add up to 100.
\n" ); document.write( "s + m + f = 100
\n" ); document.write( "replace s * f
\n" ); document.write( ".5m + m + m+5 = 100
\n" ); document.write( "2.5m = 100 - 5
\n" ); document.write( " 2.5m = 95
\n" ); document.write( " m = 95/2.5
\n" ); document.write( " m = 38 is Mom's age
\n" ); document.write( "I'll let you find s and f, check that they add up to 100 \n" ); document.write( "
\n" );