document.write( "Question 747419: If the age of father and son is 84.The age of father is three times of son then find the age of father and son.also show in graph. \n" ); document.write( "
Algebra.Com's Answer #454907 by stanbon(75887)\"\" \"About 
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If the age of father and son is 84.The age of father is three times of son then find the age of father and son.also show in graph.
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\n" ); document.write( "Equations:
\n" ); document.write( "f + s = 84
\n" ); document.write( "f = 3s
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\n" ); document.write( "Substitute for \"f\" and solve for \"s\":
\n" ); document.write( "3s+s = 84
\n" ); document.write( "4s = 84
\n" ); document.write( "s = 21 (son's age now)
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\n" ); document.write( "Solve for \"f\":
\n" ); document.write( "f = 3s
\n" ); document.write( "f = 3*21
\n" ); document.write( "f = 63 (father's age now)
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\n" ); document.write( "cheers,
\n" ); document.write( "Stan H.
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