-10\left(-\frac{1}{2}+\left(-\frac{7}{2}\right)+7y=25

Question

-10\left(-\frac{1}{2}+\left(-\frac{7}{2}\right)+7y=25

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bonexptip 6 months 2021-08-18T12:06:29+00:00 1 Answers 2 views 0

Answers ( )

  1. thongdat2
    0
    2021-08-18T12:08:07+00:00
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    Answer:

    y=\frac{47}{14}

    Step-by-step explanation:

    Given

    -10\left(-\frac{1}{2}\right)+\left(-\frac{7}{2}\right)+7y=25

    Required

    Solve for y

    -10\left(-\frac{1}{2}\right)+\left(-\frac{7}{2}\right)+7y=25

    Open brackets

    \frac{10}{2}-\frac{7}{2}+7y=25

    Collect Like Terms

    7y=25 -\frac{10}{2}+\frac{7}{2}

    Take L.C.M

    7y=\frac{50-10+7}{2}

    7y=\frac{47}{2}

    Divide both sides by 7

    y=\frac{47}{2*7}

    y=\frac{47}{14}

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