document.write( "Question 937805: Hari is twice as old as his son. 20 year ago he was 4 times as old as his son. Find the present age of each? \n" ); document.write( "

Algebra.Com's Answer #571237 by ankor@dixie-net.com(22740) $\"\"$ $\"About$

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h = H's age
\n" ); document.write( "s = son's age
\n" ); document.write( ":
\n" ); document.write( "Write an equation for each statement
\n" ); document.write( ":
\n" ); document.write( " Hari is twice as old as his son.
\n" ); document.write( "h = 2s
\n" ); document.write( " 20 year ago he was 4 times as old as his son.
\n" ); document.write( "h - 20 = 4(s-20)
\n" ); document.write( "h - 20 = 4s - 80
\n" ); document.write( "h = 4s - 80 + 20
\n" ); document.write( "h = 4s - 60
\n" ); document.write( "Replace h with 2s (from the 1st statement)
\n" ); document.write( "2s = 4s - 60
\n" ); document.write( "60 = 4s - 2s
\n" ); document.write( "60 = 2s
\n" ); document.write( "s = 60/2
\n" ); document.write( "s = 30 yrs is son's age
\n" ); document.write( " Find the present age of each?
\n" ); document.write( "h = 2(30) = 60 is H's age
\n" ); document.write( ":
\n" ); document.write( ":
\n" ); document.write( "See if that checks out in the 2nd statement
\n" ); document.write( "60 - 20 = 4(30-20)
\n" ); document.write( "40 = 4(10) \n" ); document.write( "

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