<PRE><B>Question 1034514</B>
Robert is now 78 years old and his friend Charlie is 70. How many years ago was Charlie only 3/4 as old as Robert. 
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70+x = (3/4)(78+x)
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280 + 4x = 234 + 3x
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x = -54 yrs
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Robert was then 24 yrs old
Charlie was then 16 yrs old
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Cheers,
Stan H.
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