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Step-by-step explanation:
500 g = 0.5 kg
3s + 2f = 2.25 .......... (1)
s = f - 0.5 ............... (2)
(2) ------> (1)
3(f - 0.5) + 2f = 2.25
5f - 1.5 = 2.25
f = 0.75 kg ( the mass 1 bag of flour )
s = 0.25 kg ( the mass of 1 bag of sugar )
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