On a see-saw, Dolly, Anu and Manu sit at the left end. Their mother sits at the right end. The weight of Dolly and Anu are respectively 18 kg and 16 kg and mother's weight is 54 kg. If the see-saw is horizontal, set up an equation, then find the weight of Manu.( Take x kg to be the weight of
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nnnnnnnnnnnnnnnnnnnn ooooooooooooooooooooo
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