document.write( "Question 1057043: A father age is 4 times his son.
\n" ); document.write( "in 5years time the father will be 3 times as old as his son.
\n" ); document.write( "what's are their present age
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Algebra.Com's Answer #672131 by jorel555(1290)\"\" \"About 
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Let s be the son. Then his father is 4s. So:
\n" ); document.write( "3(s+5)=4s+5
\n" ); document.write( "3s+15=4s+5
\n" ); document.write( "s=10
\n" ); document.write( "The son is 10; the father is 40. ☺☺☺☺
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