document.write( "Question 888261: the ratio of the present ages of John and Jack 2:9. four years ago, the sum of their ages was 47 years. how old is Jack now? \n" ); document.write( "

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\n" ); document.write( "the ratio of the present ages of John and Jack 2:9. four years ago, the sum of their ages was 47 years. how old is Jack now?
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document.write( "Let multiplicative factor of their ages be x
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document.write( "Then John's and Jack's current ages are: 2x and 9x, respectively
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document.write( "Four years ago, John was 2x - 4, and Jack was 9x - 4
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document.write( "Since their ages, 4 years ago, was 47, then:
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document.write( "2x - 4 + 9x - 4 = 47
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document.write( "2x + 9x = 47 + 8
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document.write( "11x = 55
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document.write( "x = , or 5
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document.write( "Therefore, Jack's current age = 9(5), or 
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