NCERT Solutions for Class 9 Maths Chapter 4
Important NCERT Questions
Linear equations in two variables
NCERT Books for Session 2022-2023
CBSE Board and UP Board Others state Board
EXERCISE 4.2
Page No:70
Questions No: 4
Find the value of k, if x = 2, y = 1 is a solution of the equation 2x + 3y = k.
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Given equation: x = 2, y = 1
In 2x + 3y = k, putting x = 2 and y = 1, we have,
2x × 2 + 3 × 1 = k
⇒ k = 7
Hence, the value of k is 7.