1) tìm x biết a) ( x – 2/3 ) : -3/7 = – 14/9

Question

1) tìm x biết
a) ( x – 2/3 ) : -3/7 = – 14/9

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Peyton 1 năm 2021-10-13T05:13:06+00:00 2 Answers 7 views 0

Answers ( )

  1. diepbich
    0
    2021-10-13T05:14:36+00:00
    Reply

    ( x – $\frac{2}{3}$ ) : $\frac{-3}{7}$ = $\frac{-14}{9}$ 

    x – $\frac{2}{3}$ = $\frac{-14}{9}$  . $\frac{-3}{7}$

    x – $\frac{2}{3}$  = $\frac{42}{63}$

    x – $\frac{2}{3}$ = $\frac{2}{3}$

    x = $\frac{2}{3}$ + $\frac{2}{3}$

    x = $\frac{4}{3}$

  3. hauyen
    0
    2021-10-13T05:14:44+00:00
    Reply

    Đáp án:

     

    Giải thích các bước giải:

     $(x-\dfrac{2}{3}):\dfrac{-3}{7}=\dfrac{-14}{9}$

    $ $

    $⇒x-\dfrac{2}{3}=\dfrac{2}{3}$

    $ $

    $⇒x=\dfrac{4}{3}$

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