Bài 1: A). (x-31)x15=0 B). 15/x = 2/12 Các bạn giúp mình nhé

Question

Bài 1:
A). (x-31)x15=0
B). 15/x = 2/12
Các bạn giúp mình nhé

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Maya 4 tuần 2021-08-17T05:02:15+00:00 2 Answers 3 views 0

Answers ( )

    0
    2021-08-17T05:03:20+00:00

    @Bơ

    `(x-31).15=0`

    `x-31=0:15`

    `x-31=0`

    `x=0+31`

    `x=31`

    Vậy `x=31`

    `15/x = 2/12`

    `=>x.2=15.12`

    `x.2=180`

    `x=180:2`

    `x=90`

    Vậy `x=90`

    0
    2021-08-17T05:03:45+00:00

    $\text{a. (x – 31) × 15 = 0}$

    $\text{x – 31 = 0 : 15}$

    $\text{x – 31 = 0}$

    $\text{⇒ x = 31}$

    $\text{b. $\dfrac{15}{x}$ = $\dfrac{2}{12}$}$

    $\text{x . 2 = 15 . 12}$

    $\text{x . 2 = 180}$

    $\text{⇒ x = 90}$

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