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
These NCERT Solutions for Class 7 Maths Chapter 4 Simple Equations Ex 4.3 Questions and Answers are prepared by our highly skilled subject experts.
NCERT Solutions for Class 7 Maths Chapter 4 Simple Equations Exercise 4.3
Question 1.
Question 2.
Solve the following equations:
(a) 2(x + 4) = 12
(b) 3(n – 5) = 21
(c) 3(n – 5) = – 21
(d) – 4(2 + x) = 8
(e) 4(2 – x) = 8
Answer:
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)
Answer:
Question 4.
(a) Construct 3 equations starting with x = 2
(b) Construct 3 equations starting with x = – 2
Answer:
(a) Starting with x = 2
(1) Multiplying both sides by 3, we get
3x = 6
Subtracting 7 from both sides, we get
3x – 7 = 6 – 7
3x – 7 = – 1
(2) x = 2
Adding 5 on both sides, we get
x + 5 = 2 + 5
x + 5 = 7
Multiplying both sides by 4, we get
4(x + 5) = 7 × 4
4 (x + 5) = 28
(b) Starting with x = – 2
(1) x = – 2
Adding 11 to both sides, we get
x + 11 = – 2 + 11
x + 11 = 9
(2) x = – 2
Multiplying both sides by 5, we get
5x = – 10
Adding 3 on both sides, we get
5x + 3 = – 10 + 3
5x + 3 = – 7
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