document.write( "Question 1038105: a father and his son have a combined age of 145.when the father was his son's age,he was twice as old as his son.how aol are the father and his son ? \n" ); document.write( "

Algebra.Com's Answer #652845 by jorel555(1290) $\"\"$ $\"About$

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A father and his son have a combined age of 145.
\n" ); document.write( "f + s = 145
\n" ); document.write( "s = -f + 145
\n" ); document.write( "When the father was his son's current age he was twice as old as his son.
\n" ); document.write( "let d = f - s; (the difference in their ages)
\n" ); document.write( "f - d = 2(s - d)
\n" ); document.write( "f - d = 2s - 2d
\n" ); document.write( "f = 2s - 2d + d
\n" ); document.write( "f = 2s - d
\n" ); document.write( "replace d with (f-s)
\n" ); document.write( "f = 2s -(f-s)
\n" ); document.write( "f = 2s - f + s
\n" ); document.write( "f + f = 2s + s
\n" ); document.write( "2f = 3s
\n" ); document.write( "replace s with (-f+145)\r
\n" ); document.write( "\n" ); document.write( "2f = 3(-f+145)
\n" ); document.write( "2f = -3f + 435
\n" ); document.write( "2f + 3f = 435
\n" ); document.write( "5f = 435
\n" ); document.write( "f = 435/5
\n" ); document.write( "f = 87 yrs is father's present age
\n" ); document.write( "then
\n" ); document.write( "s = 145 - 87
\n" ); document.write( "s = 58 yrs is the son's
\n" ); document.write( ":
\n" ); document.write( ":
\n" ); document.write( ":
\n" ); document.write( "Check this in the statement (87-58 = 29 yrs is the difference their ages)
\n" ); document.write( "\"When the father was his son's current age he was twice as old as his son.
\n" ); document.write( "87 - 29 = 2(58-29)
\n" ); document.write( "58 = 2(29) \n" ); document.write( "

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