Tìm x: a) x+1 = 4/3 b) 2x + 2x = 844 c) x .x = 25

Question

Tìm x:
a) x+1 = 4/3
b) 2x + 2x = 844
c) x .x = 25

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Khoii Minh 4 years 2020-12-01T02:09:39+00:00 2 Answers 56 views 0

Answers ( )

  1. Ladonna
    0
    2020-12-01T02:10:52+00:00
    Reply

    Đáp án:

    `a,1/3`

    `b,221`

    `c,+-5`

    Giải thích các bước giải:

    `a,x+1=4/3`

    `<=>x=4/3-1`

    `<=>x=1/3`

    Vậy `x=1/3`

    `b,2x+2x=844`

    `<=>4x=844`

    `<=>x=844:4`

    `<=>x=211`

    Vậy `x=211`

    `c,x*x=25`

    `<=>x^2=25`

    `<=>x=+-5`

    Vậy `x=+-5`

     

  2. mit
    0
    2020-12-01T02:11:01+00:00
    Reply

    `a,x+1=4/3`

    `<=>x=1/3`

    `b,2x+2x=844`

    `<=>4x=844`

    `<=>x=211`

    `c,x*x=25`

    `<=>x^2=25`

    `<=>x=+-5`

    `<=>x=` `+-`$\sqrt[]{25}$ 

     

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