RS Aggarwal Class 8 Math Eighth Chapter Linear Equations Exercise 8A Solution

RS Aggarwal Class 8 Math Eighth Chapter Linear Equations Exercise 8A Solution

EXERCISE 8A

Solve:

(1) 8x + 3 = 27 + 2x

⇒ 8x – 2x = 27 – 3

⇒ 6x = 24

⇒ x = 4

(2) 5x + 7 = 2x – 8

⇒ 5x – 2x = – 8 – 7

⇒ 3x = – 15

⇒ x = – 5

(3) 2z – 1 = 14 – z

⇒ 2z + z = 14 + 1

⇒ 3x = 15

⇒ z = 5

(4) 9x + 5 = 4(x – 2) + 8

⇒ 9x + 5 = 4x – 8 + 8

⇒ 9x – 4x = – 5

⇒ 5x = – 5

⇒ x = -1

⇒ 7y = 5y – 20

⇒ 7y – 5y = – 20

⇒ 2y = – 20

⇒ y = – 10

(7) 15(y – 4) – 2(y – 9) + 5(y + 6) = 0

⇒ 15y – 60 – 2y + 18 + 5y + 30 = 0

⇒ 18y – 60 + 48 = 0

⇒ 18y – 12 = 0

⇒ 18y = 12

(8) 3(5x – 7) – 2(9x – 11) = 4(8x – 13) – 17

⇒ 15x – 21 – 18x + 22 = 32x – 52 – 17

⇒ – 3x + 1 = 32x – 69

⇒ – 3x – 32x = – 69 – 1

⇒ – 35x = – 70

⇒ x = 2

⇒ t – 18 = 8 – 12t

⇒ t + 12t = 8 + 18

⇒ 13t = 26

⇒ t = 2



















12 Comments

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  1. it is very good and clear solution

    1. Thank You Mayank

  2. very nice solution

  3. Thanks bro its very clear to solve it is very clear also

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  4. Thanks Mimi the solutions are very clear and easy. The Google needs person as like you.

  5. Thanks for your help

  6. Very helpful

  7. Very good solutions like it and this is very much clear and you can do this in chapter 8 9 10 11 12 and moreplease I want your solutions only because I like it and in the Google you can get many things and this Google account in love you like you and always commenting you and this is very helpful for us thank you

  8. Thanks for the solutions
    I was very weak in this type of maths
    But this solution helped me
    Thank you

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