Hint:
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Let x mod y = a
Solution: https://gmtex.siri.sh/fs/1/School/Extra/Maths/Qotd%20solutions/2024-08-01_multiple-of-modulus.html
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Hint:
spoiler
Let x mod y = a
Solution: https://gmtex.siri.sh/fs/1/School/Extra/Maths/Qotd%20solutions/2024-08-01_multiple-of-modulus.html
spoiler