M l aggarwal understanding icse mathematics class 7 Solutions for Chapter 9 linear equations and inequalities

Solve the following equations: (i) 2 (3 – 2x) = 13 (ii) (3 / 5) y – 2 = (7 / 10)

(i) (x / 2) = 5 + (x / 3) (ii) 2 {x – (3 / 2)} = 11

(i) 7 (x – 2) = 2 (2x – 4) (ii) 21 – 3(x – 7) = x + 20

. If 7 is added to five times a number, the result is 57. Find the number.

If the replacement set is (-5, -3, -1, 0, 1, 3, 4), find the solution set of: (i) x < -2 (ii) x > 1 (iii) x ≥ -1 (iv) -5 < x < 3 (v) -3 ≤ x < 4 (vi) 0 ≤ x < 7

Represent the following inequations graphically: (i) x ≤ 3, x ∈ N (ii) x < 4, x ∈ W (iii) -2 ≤ x < 4, x ∈ l (iv) -3 ≤ x ≤ 2, x ∈ l