document.write( "Question 434074: The sum of the present ages of john and his father is 89 years. After 11 years the age of father will be twice the age of john at that time, find their present ages. \n" ); document.write( "

Algebra.Com's Answer #853270 by greenestamps(13258) $\"\"$ $\"About$

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\n" ); document.write( "Given that John's father will be twice as old as John is 11 years from now....

\n" ); document.write( "let x = John's age 11 years from now
\n" ); document.write( "then 2x = father's age 11 years from now
\n" ); document.write( "then x-11 = John's age now
\n" ); document.write( "and 2x-11 = father's age now

\n" ); document.write( "The sum of their present ages is 89:

\n" ); document.write( "(x-11)+(2x-11) = 89
\n" ); document.write( "3x-22 = 89
\n" ); document.write( "3x = 111
\n" ); document.write( "x = 37

\n" ); document.write( "John's present age = x-11 = 37-11 = 26
\n" ); document.write( "father's present age = 2x-11 = 74-11 = 63

\n" ); document.write( "ANSWERS: 26 and 63

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\n" ); document.write( "I chose to set the problem up in a different way than the other tutors.

\n" ); document.write( "Sometimes that can make a big difference in how much work it takes to solve the problem.

\n" ); document.write( "It didn't make much difference in this problem....

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