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Chapter 4 Simple Equations Exercise 4.3


Question 1.
Solve the following equations:


Solution:
NCERT Solutions for Class 7 Maths Chapter 4 Simple Equations Ex 4.3 2
NCERT Solutions for Class 7 Maths Chapter 4 Simple Equations Ex 4.3 3
NCERT Solutions for Class 7 Maths Chapter 4 Simple Equations Ex 4.3 4
NCERT Solutions for Class 7 Maths Chapter 4 Simple Equations Ex 4.3 5

NCERT Solutions for Class 7 Maths Chapter 4 Simple Equations Ex 4.3 6
NCERT Solutions for Class 7 Maths Chapter 4 Simple Equations Ex 4.3 7

(b) 3(n – 5) = 21
⇒  (Dividing both sides by 3)
⇒ n – 5 = 7
⇒ n = 7 + 5 (Transposing 5 to RHS)
n = 12
Check: Put n = 12 in LHS
3(12 – 5) = 3 × 7 = 21 RHS as required

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:
NCERT Solutions for Class 7 Maths Chapter 4 Simple Equations Ex 4.3 8
NCERT Solutions for Class 7 Maths Chapter 4 Simple Equations Ex 4.3 9

Question 4.
(a) Construct 3 equations starting with x = 2
(b) Construct 3 equations starting with x – -2.
Solution:
(a) Possible equations are:


(b) Possible equations are:
3x= -6; 3x + 7 = 1; 3x + 10 = 4

NCERT Solutions for Class 7 Maths Chapter 4 Simple Equations Ex 4.3 Q1
NCERT Solutions for Class 7 Maths Chapter 4 Simple Equations Ex 4.3 Q1.1
NCERT Solutions for Class 7 Maths Chapter 4 Simple Equations Ex 4.3 Q2
NCERT Solutions for Class 7 Maths Chapter 4 Simple Equations Ex 4.3 Q3
NCERT Solutions for Class 7 Maths Chapter 4 Simple Equations Ex 4.3 Q3.1
NCERT Solutions for Class 7 Maths Chapter 4 Simple Equations Ex 4.3 Q4
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