self Maths Puzzle

An old man distributed his estate worth x dollars to his three sons Allen, Tommy, and Peter. Whoreceived the smallest part of the estate?
(1)Allen got 4/5 of what Tommy got and 3/5 of what Peter got.
(2)Peter got 5/4 of what Tommy got and Tommy got 100 dollars more than what Allen got.

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self Other Question

On multiplying a number by 7, the product is a number each of whose digits is 3. The smallest such number is: The product of two numbers a and b equals one-quarter their average. What is a in terms of b?