If $x$ and $y$ are positive integers such that $y$ is a multiple of 5 and $3x+4y=200$, then $x$ must be a multiple of which of the following.

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সঠিক উত্তর: 10। ব্যাখ্যা:

If \(x\) and \(y\) are positive integers such that \(y\) is a multiple of 5 and \(3x+4y=200\), then \(x\) must be a multiple of which of the following.