# Verify a – (– b) = a + b for the following values of a and b.

(i) a = 21, b = 18 (ii) a = 118, b = 125

(iii) a = 75, b = 84 (iv) a = 28, b = 11

**Solution:**

Let, a - (- b) = a + b ---- (1)

(i) a = 21, b = 18

Put the values of a & b in equation (1)

a - (-b) = a + b

21 - (- 18) = 21 + 18

21 + 18 = 21 + 18

39 = 39

LHS = RHS. Hence verified.

(ii) a = 118, b = 125

Put the values of a & b in equation (1)

a - (- b) = a + b

118 - (-125) = 118 + 125

118 + 125 = 118 + 125

243 = 243

LHS = RHS. Hence verified.

(iii) a = 75, b = 84

Put the values of a & b in equation (1)

a - (- b) = a + b

75 - (-84) = 75 + 84

75 + 84 = 75 + 84

159 = 159

LHS = RHS. Hence verified.

(iv) a = 28, b = 11

Put the values of a & b in equation (1)

a - (-b) = a + b

28 - (-11) = 28 + 11

28 + 11 = 28 + 11

39 = 39

LHS = RHS. Hence verified.

**☛ Check: **NCERT Solutions for Class 7 Maths Chapter 1

**Video Solution:**

## Verify a – (– b) = a + b for the following values of a and b. (i) a = 21, b = 18 (ii) a = 118, b = 125 (iii) a = 75, b = 84 (iv) a = 28, b = 11

NCERT Solutions Class 7 Maths Chapter 1 Exercise 1.1 Question 8

**Summary:**

a – (– b) = a + b for the following values of a and b has been verified (i) a = 21, b = 18 (ii) a = 118, b = 125 (iii) a = 75, b = 84 (iv) a = 28, b = 11. In all four given cases, L.H.S = R.H.S

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