Let the number be 10x + y. Then x + y = 9 and 9(10x + y) = 2(10y + x). The second simplifies to 88x – 11y = 0, giving y = 8x. Substituting yields x = 1, y ...
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Let the number be 10x + y. Then x + y = 9 and 9(10x + y) = 2(10y + x). The second simplifies to 88x – 11y = 0, giving y = 8x. Substituting yields x = 1, y ...