Adv
AnilSinghBora
  • 0
Guru

Solve the following pairs of equations by reducing them to a pair of linear equations: (v) (7x-2y)/ xy = 5 (8x + 7y)/xy = 15 Q.1(5)

  • 0

The solution of exercise 3.6 of class 10th of question no.1  How i solve this question in simple way. Because it is very important for class 10 Solve the following pairs of equations by reducing them to a pair of linear equations: (v) (7x-2y)/ xy = 5 (8x + 7y)/xy = 15

Share

1 Answer

  1. (7x-2y)/ xy = 5

    7/y – 2/x = 5…………………………..(i)

    (8x + 7y)/xy = 15

    8/y + 7/x = 15…………………………(ii)

    Substituting 1/x =m in the given equation we get,

    – 2m + 7n = 5 => -2 + 7n – 5 = 0 ……..(iii)

    7m + 8n = 15 => 7m + 8n – 15 = 0 ……(iv)

    By cross-multiplication method, we get,

    m/(-105-(-40)) = n/(-35-30) = 1/(-16-49)

    m/(-65) = n/(-65) = 1/(-65)

    m/-65 = 1/-65

    m = 1

    n/(-65) = 1/(-65)

    n = 1

    m = 1 and n = 1

    m = 1/x = 1 n = 1/x = 1

    Therefore, x = 1 and y = 1

    • 0
Leave an answer

Leave an answer

Browse

Choose from here the video type.

Put Video ID here: https://www.youtube.com/watch?v=sdUUx5FdySs Ex: "sdUUx5FdySs".

Captcha Click on image to update the captcha.

Related Questions