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9/7x(6/5-12/7)怎么做? Hello! To simplify the expression 9/7x(6/5-12/7), we follow the order of operations, which is parentheses first, then multiplication and division from left to right, and finally addition and subtraction from left to right. First, in the parentheses, we simplify the expression: (6/5 - 12/7). To simplify fractions, we need to find a common denominator. The least common multiple (LCM) of 5 and 7 is 35, so we can rewrite the expression as follows: (6/5) - (12/7) = (6/5)(7/7) - (12/7)(5/5) = 42/35 - 60/35 Now that the fractions have the same denominator, we can subtract them: = (42 - 60)/35 = -18/35 Now, we can substitute this result back into the original expression: 9/7x(-18/35) Next, we perform the multiplication: (9/7)(-18/35) = (9*-18)/(7*35) = -162/245 So, the simplified expression is -162/245.为确保婚俗改革工作落地落实,庆云县制定《“反对浪费·文明办事”移风易俗专项行动实施方案》,构建县、乡、村“三位一体”长效机制。 高尿酸是人体健康一个危险的讯号,希望大家能引起足够的重视,及早预防,及早干预。
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