Welcome to the Den, talon. There are many useful information about this forum in rules (see link "Important: READ BEFORE POSTING" at the top). For instance, perform a quick search before you post a riddle that you have not created. This way we ensure that you always get new riddles and don't have to see the same riddle each week.
BTW, this is one of my favorite puzzles and I have dedicated 1 whole page to such weighing and measuring puzzles.
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