document.write( "Question 939639: Brad is nine more than two times as old as Ben. In 15 years the sum of their ages wil be 111. How old is Ben now? \n" ); document.write( "
Algebra.Com's Answer #572601 by laoman(51)\"\" \"About 
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Let the age of brad be br and age of ben be b
\n" ); document.write( "From the first statement, br = 2*b + 9 ------ eqn 1
\n" ); document.write( "From the second statement, i.e in 15 yrs,
\n" ); document.write( "Brad's age in 15yrs is br+15 and Ben's age would be b+15
\n" ); document.write( "Given that the sum of their ages would be 111
\n" ); document.write( "i.e br+15+b+15 = 111
\n" ); document.write( "Simplifying
\n" ); document.write( "br+b = 111-30
\n" ); document.write( "br+b =81 --------eqn 2
\n" ); document.write( "Substituting 1 into 2,
\n" ); document.write( "2*b + 9 + b =81,
\n" ); document.write( "3b = 81-9 = 72
\n" ); document.write( "b = 72/3 = 24
\n" ); document.write( "Therefore Ben's age, b is 24 years
\n" ); document.write( "QED\r
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\n" ); document.write( "\n" ); document.write( "Also we can find br, i.e br = 2*b+9 = 2*24+9 = 57
\n" ); document.write( "Therefore, Brad's age is also 57
\n" ); document.write( "In the next 15 years, their age sum would absolutely be 111
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