# 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

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

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

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

LHS = RHS. Hence Verified.

**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

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

In all 4 given cases, since L.H.S = R.H.S Hence it is verified