If the Replacement Set = {- 6,. - 3, 0, 3, 6, 9}; Find the Truth Set of the Following : 3x + 7 < 1 - Mathematics

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Sum

If the replacement set = {- 6,. - 3, 0, 3, 6, 9}; find the truth set of the following : 3x + 7 < 1

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Solution

3x + 7 ≤ 1

⇒ 3x + 7 – 7 ≤ 1 – 7 (Subtracting 7)

⇒ 3x ≤ – 6

⇒ x ≤ – 2

Required Answer = {-6, -3}

Concept: Replacement Set and Solution Set
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Chapter 15: Linear Inequations - Exercise 15 (A) [Page 173]

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Selina Concise Mathematics Class 8 ICSE
Chapter 15 Linear Inequations
Exercise 15 (A) | Q 2.2 | Page 173
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