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In a formula, the sum of two external terms is 37, the difference is 13, and the ratio is 5 / 6. The formula can be () Don't solve equations, just formulas and answers, and don't write
One of the external terms: (37 + 13) / 2 = 25
Another external term: 27-25 = 12
The previous internal term: 25 / (5 / 6) = 30
The following internal terms: (5 / 6) * 12 = 10
Proportion formula: 25:30 = 10:12 = 5 / 6
If you are not satisfied, you can close the problem. It doesn't matter~
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