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Find the value of the following expression, when x = −1: 2x - 7 - Mathematics

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Question

Find the value of the following expression, when x = −1:

2x - 7

Sum

Solution

2x - 7 on putting x = -1 in the given equation

= 2 × (-1) - 7

= -2 - 7

= -9

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Chapter 12: Algebraic Expressions - Exercise 12.3 [Page 242]

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NCERT Mathematics [English] Class 7
Chapter 12 Algebraic Expressions
Exercise 12.3 | Q 3.1 | Page 242

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