document.write( "Question 1200068: In 25 years. Joseph age will be eight times as old as he was 10 years ago. How old is he now? \n" ); document.write( "

Algebra.Com's Answer #834097 by greenestamps(13200) $\"\"$ $\"About$

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\n" ); document.write( "Always be aware of the possibility of solving a problem using formal algebra by setting up the problem in different ways.

\n" ); document.write( "The other tutor has provided one typical solution, starting by using Joseph's current age as the variable.

\n" ); document.write( "Here is an alternate setup for solving the problem.

\n" ); document.write( "Let x be Joseph's age 10 years ago.

\n" ); document.write( "Then Joseph's age 25 years from now will be x+35.

\n" ); document.write( "Joseph's age 25 years from now will be 8 times his age 10 years ago:

\n" ); document.write( " $\"x%2B35=8x\"$
\n" ); document.write( " $\"7x=35\"$
\n" ); document.write( " $\"x=5\"$

\n" ); document.write( "Joseph was 5 years old 10 years ago, so his age now is 15.

\n" ); document.write( "ANSWER: 15

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