the value of (-15/23)+(+30/-46) is ===.​

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the value of (-15/23)+(+30/-46) is ———.​

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Doris 5 years 2021-07-23T19:15:32+00:00 1 Answers 65 views 0

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  1. vankhanh
    0
    2021-07-23T19:17:12+00:00
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    \frac{ - 15}{23} + \frac{30}{ - 46} \\ = \frac{ - 15}{23} + \frac{(2) \times (15)}{(2) \times ( - 23)} \\ = \frac{ - 15}{23} + \frac{15}{ - 23} \\ = \frac{ - 15}{23} - \frac{15}{23} \\ = \frac{ -3 0}{23} \\ = - 1.3

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Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )