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Q: What is 2n plus 6 equals 7n - 9?

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2n plus 7 equals 19 2n equals 12 n equals 6

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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

Given that 2n = 6 + n, subtract n from each side and n = 6

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6+5n=2n-9Isolate the variable by subtracting 2n and 6 from both sides.5n-2n=-9-63n=-15n=-5

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