document.write( "Question 1170973: The sum of the ages for Peter and Paul is 24. Five years ago their respective ages were in the ratio 3:4. How old will they be in three years time? \n" ); document.write( "

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\n" ); document.write( "The sum of the ages for Peter and Paul is 24. Five years ago their respective ages were in the ratio 3:4. How old will they be in three years time?
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Let Peter's age be P
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document.write( "Then Paul's is: 24 - P
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document.write( "We then get: 
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document.write( "4(P - 5) = 3(19 - P) ------ Cross-multiplying 
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document.write( "4P - 20 = 57 - 3P
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document.write( "4P + 3P = 57 + 20
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document.write( "7P = 77
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document.write( "Peter or 
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document.write( "Paul's age: 
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document.write( "Can you now find their ages, 3 years from now? \n" );
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