document.write( "Question 798886: Mary's father is four times as old as Mary. Five years ago, he was seven times as old. How old is each now? \n" ); document.write( "
Algebra.Com's Answer #482401 by Cromlix(4381)\"\" \"About 
You can put this solution on YOUR website!
Mary's father is four times as old as Mary
\n" ); document.write( "F = 4M
\n" ); document.write( "F - 5 = 7(M - 5)
\n" ); document.write( "Replace F with $M from first equation.
\n" ); document.write( "4M - 5 = 7M - 35
\n" ); document.write( "Collect like terms;
\n" ); document.write( "4M - 7M = -35 + 5
\n" ); document.write( "- 3M = - 30
\n" ); document.write( "M = 10
\n" ); document.write( "Currently,
\n" ); document.write( "Mary is 10 years old
\n" ); document.write( "Father is 40 years old.
\n" ); document.write( "Hope this helps.
\n" ); document.write( ":-)
\n" ); document.write( "
\n" ); document.write( "
\n" );