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The numerator and denominator of a true fraction are two continuous natural numbers. If the numerator plus 3 and the fraction is 4 / 5, then the original fraction is () I want to explain that the equation method and the arithmetic method are best,
Suppose the denominator x, then the numerator X-1. Then the original formula is equal to X-1 + 3 / x = 4 / 5, cross multiply 4x = 5x + 10, so it is impossible to calculate
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