document.write( "Question 397584: Joe is 5 years older than Sally. In 15 years Joe will be 3 times as old as Sally is now. How old is Sally now? Hint: Write Joe's age now in terms of Sally's age now. Then write Joe's age in 15 years using the expression you just wrote for Joe's age now. Then using S for Sally's age now, write the equation in only one variable \"S\" and solve it \n" ); document.write( "

Algebra.Com's Answer #283635 by ewatrrr(24785) $\"\"$ $\"About$

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document.write( "Hi, 
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document.write( "Joe is 5 years older than Sally
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document.write( "Let x and (x + 5) represent Sally's and Joe's ages NOW  respectively
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document.write( "Question states*** in 15 years...
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document.write( "   (x + 5)  + 15 = 3x
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document.write( "Solving for x
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document.write( "       20 = 2x
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document.write( "       x = 10, Sally's age NOW. Joe age NOW is 15.  (10+5) \r
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document.write( "CHECKING our Answer***
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document.write( "15 + 15 = 3*10 \n" );
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