(2x – 3) : 21 = (x + 1) : 16

Question

(2x – 3) : 21 = (x + 1) : 16

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Calantha 4 years 2020-10-29T03:42:12+00:00 2 Answers 52 views 0

Answers ( )

  1. Eirian
    0
    2020-10-29T03:43:42+00:00
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    Đáp án:

    `16(2x-3) = 21(x+1)`

    ` 32x – 48 = 21x + 21`

    ` 32x – 21x = 21 + 48`

     `11x = 69`

    `=> x = 69/11`

     ~ω~

  2. sori
    0
    2020-10-29T03:43:54+00:00
    Reply

    Đáp án: x = $\frac{69}{11}$ 

     

     $\frac{2x-3}{21}$ = $\frac{x+1}{16}$ 

    <=> 16(2x-3) = 21(x+1)

    <=> 32x – 48 = 21x + 48
    <=> 32x – 21x = 21 + 48

    <=> 11x = 69
    => x = $\frac{69}{11}$ 

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