Question
A crate which contains 7 similar packets of potato starch and 5 similar packets of corn starch has a mass of 6 kg 30 g. The crate alone is 390 g. Each packet of potato starch has a mass of 320 g. Find the mass of each packet of corn starch in kg.
3 m

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A crate which contains 7 similar packets of potato starch and 5 similar packets of corn starch has a mass of 6 kg 30 g. The crate alone is 390 g. Each packet of potato starch has a mass of 320 g. Find the mass of each packet of corn starch in kg.