document.write( "Question 433361: seven years ago father's age was 5 times of his son's age. 14 years hence their age will be the ratio of 7:3. what is the present age of father \n" ); document.write( "
Algebra.Com's Answer #300428 by stanbon(75887)\"\" \"About 
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seven years ago father's age was 5 times of his son's age. 14 years hence their age will be the ratio of 7:3. what is the present age of father
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\n" ); document.write( "(f-7)=5(s-7)
\n" ); document.write( "(f+14)/(s+14) = 7/3
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\n" ); document.write( "Rearrange:
\n" ); document.write( "f = 5s-28
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\n" ); document.write( "Substitute and solve for \"s\":
\n" ); document.write( "(5s-28+14)/(s+14) = 7/3
\n" ); document.write( "Cross multiply:
\n" ); document.write( "3(5s-14) = 7(s+14)
\n" ); document.write( "15s-42 = 7s+98
\n" ); document.write( "8s = 140
\n" ); document.write( "s = 35/2 (son's age now)
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\n" ); document.write( "Solve for \"f\":
\n" ); document.write( "f = 5s-28
\n" ); document.write( "f = 5*35/2-28
\n" ); document.write( "f = 175/2-28
\n" ); document.write( "f = 59.5 (father's age now)
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
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