Mathematics, 01.02.2021 21:40 carelee1269

The sum of three numbers is 6. The first, minus the second, plus 3 times the third, is 12. The third, plus 4 times the first, plus the second, is 21. What are the numbers?

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The sum of three numbers is 6. The first, minus the second, plus 3 times the third, is 12. The third...

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