Linear Equations in Two Variables - Class 9 CBSE Guide | NCERT Solutions Mathematics Exercise 4.1

 

Class 9 CBSE Guide NCERT Solutions  >  9th NCERT Mathematics Guide

Class IX, CBSE Guide NCERT Solutions

Linear Equations in Two Variables

NCERT Solutions of Class 9 Mathematics Exercise 4.1

Question.1:  The cost of a note book is twice the cost of a pen. Write a linear equation in two variables to represent this statement.
(Take the cost of a note book Rs x and that of a pen Rs y)
Solution:
Cost of cost of a note book Rs x and cost of a pen Rs x.
By given condition,  x = 2y
  x - 2y = 0 is the required linear equation.

Question.2: Express the following linear equations in the form ax + by + c = 0 and indicate the values of a, b and c in each case :
(i) 2x + 3y = 9.35      (ii) x - y/5 - 10 = 0
(iii) -2x + 3y = 6       (iv) x = 3y
(v) 2x = -5y              (vi) 3x + 2 = 0
(vii) y - 2 = 0          (viii) 5 = 2x    
Solution:

Linear Equations in Two Variables - Class 9 CBSE Guide | NCERT Solutions Mathematics Exercise 4.1


  

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