NCERT Solutions for Class 7 Mathematics Chapter 12
Important NCERT Questions
Class vii Math Chapter 12 Algebraic Expressions Exercise 12.3
NCERT Books for Session 2022-2023
CBSE Board
Questions No: 3
Find the value of the following expressions, when x = -1: (i) 2x-7 (ii) -x + 2
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(i) 2x-7 = 2(-1)-7 [Putting x =-1]
= -2-7 = -9
(ii) -x + 2 = -(-1)+2 [Putting x =-1]
= 1 + 2 = 3
Class 7 Maths Chapter 12 Exercise 12.3
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