document.write( "Question 891879: a man was 4 times less than 1 year as old as his son 5years ago.in 4 years time,the man wil b 2time plus4 years as old the son.find their present age \n" ); document.write( "

Algebra.Com's Answer #540138 by ankor@dixie-net.com(22740) $\"\"$ $\"About$

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let m = man's present age
\n" ); document.write( "let s = son's present age
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\n" ); document.write( "Write an equation for each statement; simplify as much as possible
\n" ); document.write( ":
\n" ); document.write( "a man was 4 times less than 1 year as old as his son 5years ago.
\n" ); document.write( "m - 5 = 4(s-5) - 1
\n" ); document.write( "m - 5 = 4s - 20 - 1
\n" ); document.write( "m = 4s - 20 - 1 + 5
\n" ); document.write( "m = 4s - 16
\n" ); document.write( ":
\n" ); document.write( "in 4 years time, the man wil b 2time plus4 years as old the son.
\n" ); document.write( "m + 4 = 2(s+4) + 4
\n" ); document.write( "m + 4 = 2s + 8 + 4
\n" ); document.write( "m + 4 = 2s + 12
\n" ); document.write( "m = 2s + 12 - 4
\n" ); document.write( "m = 2s + 8
\n" ); document.write( ":
\n" ); document.write( "m = m, therefore we can write the two equations as
\n" ); document.write( "4s - 16 = 2s + 8
\n" ); document.write( "4s - 2s = 8 + 16
\n" ); document.write( "2s = 24
\n" ); document.write( "s = 12 yrs is the son
\n" ); document.write( ":
\n" ); document.write( "I'll you find the man's age using the 1st equation, check the solutions in the 2nd equation\r
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\n" ); document.write( "\n" ); document.write( "find their present age \n" ); document.write( "

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