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ICSE-VIII-Mathematics

15: Linear Inequations Class 8 Maths

with Solutions -
Qstn# A-3 Prvs-QstnNext-Qstn
  • #3
    Solve 7 > 3x - 8; x ∈ N
    Ans : 7 > 3x - 8
    ⇒ 7 - 3x > 3x - 3x - 8 (Subtracting 3x)
    ⇒ 7 - 7 - 3x > 3x - 3x - 8 - 7 (Subtracting 7)
    ⇒ -3x > -15
    ⇒ x < 5 (Dividing by -3)
    Required Answer = {1, 2, 3, 4}
    Note : Division by negative number reverses the inequality.