2x+2z+3x
3x-y-z
2y+2z-3x
কোনোটিই নয়
Source: কন্ট্রোলার জেনারেল ডিফেন্স ফাইন্যান্স- এর কার্যালয়ের অধীন অডিটর - 03.11.2017
Answer: 2y+2z-3x
Explanation:
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ঘড়ি বিষয়ক সমস্যা (Clock Related Problem)
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