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Mathematics, 28.01.2021 01:00 econsta3
100 aliens attended an inter-species meeting on Mars. 76 of them needed breathing apparatus, 52 needed shaded goggles, but 23 aliens didn't need either. How many aliens needed breathing apparatus goggles?
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100 aliens attended an inter-species meeting on Mars. 76 of them needed breathing apparatus, 52 need...
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