Solve : 9x - 7 ≤ 5: 28 + 4x ; X ∈ W. - Mathematics

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Sum

Solve : 9x - 7 ≤ 5: 28 + 4x ; x ∈ W. 

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Solution

9x – 1 ≤ 28 + 4x

⇒ 9x – 4x – 7 ≤ 28 + 4x – 4x (Subtracting 4x)

⇒ 5x – 7 ≤ 28

⇒ 5x – 7 + 7 ≤ 28 + 7 (Adding 7)

⇒ 5x ≤ 35

⇒ x ≤ 7 (Dividing by 5)

Required answer = {0, 1, 2, 3, 4, 5, 6, 7}

Concept: Replacement Set and Solution Set
  Is there an error in this question or solution?
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 5 | Page 173
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