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: 7
Simplify these expressions and find their values if x=3,a=-1,b=-2: 3x-5-x+9
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3x-5-x+9 = 3x – x – 5 + 9 = 2x + 4
= 2 x 3 + 4 [Putting x = 3]
= 6 + 4 = 10
Class 7 Maths Chapter 12 Exercise 12.3
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