Ответы на вопрос:
2 1/3x -3*(2 - 1/8x) = 2 1/3x -6 + 3/8x = 2 8/24x + 9/24x - 6 = 2 17/24x - 6 x = 2 2 17/24 *2 - 6 = 65/24 * 2 - 6 = 65/12 - 6 = 65/12 - 72/12 = -7/12 ===== 3 1/9 * (3/14x + 18) - 4/15 * (2.5x - 30) = 28/9 * 3/14x + 28/9 * 18 - 4/15 * 2.5x + 4/15 * 30 = 2/3x + 28*2 - 2/3x + 4*2 = 56 + 8 = 64 ==== 5b - 3*(2a - b) = 5b - 6a + 3b = 8b - 6a = 2*(4b - 3a) 4b - 3a = 1 2*1 = 2
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