NCERT Solutions for Class 8 Maths Chapter 2

NCERT Solutions for Class 8 Maths Chapter 2 LINEAR EQUATIONS IN ONE VARIABLE in English Medium as well as Hindi Medium updated for new academic session 2020-2021 based on latest NCERT Books for new session.

Download प्रश्नावली 2.1, प्रश्नावली 2.2, प्रश्नावली 2.3, प्रश्नावली 2.4, प्रश्नावली 2.5 and प्रश्नावली 2.6 in Hindi Medium or Exercise 2.1, Exercise 2.2, Exercise 2.3, Exercise 2.4, Exercise 2.5 and Exercise 2.6 in English Medium free to use online or download in PDF to use offline. NCERT Solutions 2020-21 for other subjects are also given as downloadable format. All the solutions are in updated format based on latest NCERT Books for session 2020-2021.

NCERT Solutions for Class 8 Maths Chapter 2

Class:8
Subject:Maths – गणित
Chapter 2:Linear Equations in One Variable

Class 8 Maths Chapter 2 Solutions

NCERT Solutions of Class 8 Maths Chapter 2 Linear Equations in One Variable all Exercises are in English as well as in Hindi Medium given below to download in PDF form or use online. NCERT Solutions Offline Apps 2020-21 are also given to free download based on latest NCERT Books 2020-2021.

Class 8 Maths Exercise 2.1 & 2.2 Solutions in Video

Class 8 Maths Exercise 2.1 Solutions in Video
Class 8 Maths Exercise 2.2 Solutions in Video

Class 8 Maths Exercise 2.3 & 2.4 Solutions in Video

Class 8 Maths Exercise 2.3 Solutions in Video
Class 8 Maths Exercise 2.4 Solutions in Video

Class 8 Maths Exercise 2.5 & 2.6 Solutions in Video

Class 8 Maths Exercise 2.5 Solutions in Video
Class 8 Maths Exercise 2.6 Solutions in Video

More about Class 8 Maths Chapter 2

In Chapter 2, we are concerned about algebraic equations in an equality involving variables. It means the value of expression on the both sides are equal. The solution of the equation may be any Rational Number. During the solutions, the variables can be transported from one side to other side of the equation. In order to solve the equation, first make it simplified and convert it into simple linear equation and then shift all the variables one side and constants on the other side.
Download Class 8 Maths App for offline use or कक्षा 8 गणित App in Hindi Medium.

A positive number is 5 times another number. If 21 is added to both the numbers, then one of the new numbers becomes twice the other new number. What are the numbers?

Let another number be x.
Then positive number = 5x
According to the question,
5x + 21 = 2 (x + 21)
⇒ 5x + 21 = 2x + 42
⇒ 5x + 21 = 2x + 42 – 21
⇒5x = 21
⇒ x = 21/3 = 7
Hence another number = 7 and positive number = 5 x 7 =35

Shobo’s mother’s present age is six times Shobo’s present age. Shobo’s age five years from now will be one third of his mother’s present age. What are their present age?

Let Shobo’s present age be x years.
And Shobo’s mother’s present age = 6x years
According to the question,
x + 5 = (1/3) × 6x
⇒ x + 5 = 2x
⇒ 2x = x + 5
⇒ 2x – x = 5
⇒ x = 5 years.
Hence, Shobo’s present age = 5 years and Shobo’s mother’s present age = 6 x 5 = 30 years

दादाजी की आयु अपनी पौत्री की आयु की दस गुनी है। यदि उनकी आयु पौत्री की आयु से 54 वर्ष अधिक है तो उन दोनों की आयु ज्ञात कीजिए।

माना, पौत्री की वर्तमान आयु x वर्ष
इसलिए, दादाजी की वर्तमान आयु = 10x वर्ष
प्रश्नानुसार, 10x = x + 54
⇒ 10x – x = 54
⇒ 9x = 54
⇒ x = 54/9 = 6 वर्ष
अतः, पौत्री की वर्तमान आयु = 6 वर्ष और दादाजी की वर्तमान आयु = 10 x 6 = 60 वर्ष है।

अमन की आयु उसके पुत्र की आयु की तीन गुनी है। 10 वर्ष पहले उसकी आयु पुत्र की आयु की पाँच गुनी थी। दोनों की वर्तमान आयु ज्ञात कीजिए।

माना, पुत्र की वर्तमान आयु x वर्ष
इसलिए, अमन की वर्तमान आयु = 3x वर्ष
प्रश्नानुसार, 3x – 10 = 5(x – 10)
⇒ 3x – 10 = 5x – 50
⇒ 3x – 5x = – 50 + 10
⇒ – 2x = – 40
⇒ 2x = 40
⇒ x = 40/2 = 20 वर्ष
अतः, पुत्र की वर्तमान आयु = 20 वर्ष और अमन की वर्तमान आयु = 3 x 2 = 60 वर्ष है।

रैखिक समीकरणों के अनुप्रयोग

रैखिक समीकरणों के विविध अनुप्रयोगों को पहले सरल समीकरण में परिवर्तित करें और फिर उसे हल करें। इस पाठ में संख्याओं पर आधारित प्रश्न, आयु तथा दूरियों पर प्रश्न, परिमापों और मुद्रा पर आधारित प्रश्न दिए हैं जिन्हें पहले सरल समीकरण में बदलना है और फिर उसे हल करना है।

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NCERT Solutions for Class 8 Maths Chapter 2 Exercise 2.1
NCERT Solutions for Class 8 Maths Chapter 2 Exercise 2.1 in english medium
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NCERT Solutions for Class 8 Maths Chapter 2 Exercise 2.2
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