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ATQ,
Initial quantity of ink in the jar = 180 × 4/6 = 120 liters
Initial quantity of water in the jar = 180 – 120 = 60 liters
(120 + 24)/(60 + 36) = x/6
144/96 = x/6
3/2 = x/6
x = (3 × 6)/2 = 18/2 = 9
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