In each of the following, find x/y given that: 12 x = 3 y, 1/4, 3/4, 4/1, 12/3, If a = 5 b, find: b / a, 5, 1/5, 5/1, 1, Find the number which if added to each of the numbers 1, 13, 7, 31, they become proportional numbers., 3, 4, 5, 6, Given that x / 4 = y / 5 = z / 3, what is the value of the expression: (x - y + 2z) / (2x + y - z)?, 1/2, 1/4, 2, 3/2

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