document.write( "Question 762563: the summation of ages of father and son is 60 years. what will the summation of their ages after 15 years?
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Algebra.Com's Answer #464073 by josgarithmetic(39621)\"\" \"About 
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f father age
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\n" ); document.write( "\n" ); document.write( "f+s=60.\r
\n" ); document.write( "\n" ); document.write( "15 years in the future:
\n" ); document.write( "(f+15)+(s+15)= ?
\n" ); document.write( "f+15+s+15
\n" ); document.write( "f+s+30
\n" ); document.write( "(f+s)+30
\n" ); document.write( "60+30=90
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