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2 - 7n = 6therefore 7n = 2 - 6 = -4 and so n = -4/7

Then 5m + 7n = 6.4 becomes 5m - 4 = 6.4 so that 5m = 10.4 and then m = 10.4/5 = 2.08

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Q: What is the answer to 5m plus 7n equals 6.4 2-7n equals 6?
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