One-tenth of a number is 2 less than one-seventh of its predecessor. Find the number
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if number means whole numbers, then let x be the number
(x/10) = ((x-1)/7) -2
x/10 = (x -1 -14)/7
x/10 = (x-15)/7
cross multiply the fractions
7x = 10x -150
-3x = -150
x = 50
the number is 50
check the answer
(50/10) = (49/7) - 2
5 = 5
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