NCERT Solutions for Class 7 Maths Chapter 4 Simple Equations Ex 4.3

### NCERT Solutions for Class 7 Maths Chapter 4 Simple Equations Ex 4.3

**NCERT Solutions for Class 7 Maths Chapter 4 Simple Equations Exercise 4.3**

Ex 4.3 Class 7 Maths Question 1.

Solve the following equations:

Solution:

Ex 4.3 Class 7 Maths Question 2.

Solve the following equations:

(а) 2(x + 4) = 12

(b) 3(n – 5) = 21

(c) 3(n – 5) = -21

(d) -4(2 + x) = 8

(e) 4(2 – x) = 8

Solution:

(a) 2(x + 4) = 12

⇒ x = 6 – 4 (Transposing 4 to RHS)

⇒ x – 2

Check: Put x = 2 in LHS

2(2 + 4) = 2 × 6 = 12 RHS as required

(b) 3(n – 5) = 21

⇒ n = 7 + 5 (Transposing 5 to RHS)

n = 12

Check: Put n = 12 in LHS

3(12 – 5) = 3 × 7 = 21 RHS as required

(c) 3(n – 5) = -21

⇒ n = -7 + 5 (Transposing 5 to RHS)

⇒ n = -2

Check: Put n = -2 in LHS

3(-2 – 5) = 3 × -7

= -21 RHS as required

(d) -4(2 + x) = 8

⇒ x = -2 – 2 (Transposing 2 to RHS)

⇒ x = —4

Check: Put x = -4 in LHS

-4(2 – 4) = -4 × -2 = 8 RHS as required

(e) 4(2-x) = 8

∴ x = 0 (Multiplying both sides by -1)

Check: Put x = 0 in LHS

4(2 – 0) = 4 × 2 = 8 RHS as required

Ex 4.3 Class 7 Maths Question 3.

Solve the following equations:

(a) 4 = 5(p- 2)

(b) -4 = 5(p – 2)

(c) 16 = 4 + 3 (t + 2)

(d) 4 + 5(p – 1) = 34

(e) 0 = 16 + 4(m – 6)

Solution:

(c) 16 = 4 + 3 (t + 2)

(d) 4 + 5(p – 1) = 34

(e) 0 = 16 + 4(m – 6)

Ex 4.3 Class 7 Maths Question 4.

(a) Construct 3 equations starting with x = 2

(b) Construct 3 equations starting with x – -2.

Solution: