Question 1051897
A piece of metal 1/3 plus 24 oz. is brass, and 3/4 minus 42 oz. is copper. Determine weight of metal piece. 
The statement indicates the problem using letters is a "general solution" for all examples of the same kind. 
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A piece of metal 1/3 plus 24 oz. is brass, and 3/4 minus 42 oz. is copper. 
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1/3 of what?
3/4 of what?