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

(a) 3 equations starting with x = 2.
(i) x = 2
Multiplying both sides by 10,
10x = 20
Adding 2 both sides
10x + 2 = 20+2 = 10x+2 = 22

(ii) x = 2
Multiplying both sides by 5
5x = 10
Subtracting 3 from both sides
5x-3 = 10-3 = 5x-3 = 7

(iii) x = 2
Dividing both sides by 5
x/5 = 2/5

(b) 3 equations starting with x = -2.
(i) x = -2
Multiplying both sides by 3
3x=-6
(ii) x = -2
Multiplying both sides by 3
3x=-6
Adding 7 to both sides
3x+7 = -6+7 = 3x+7 =1

Class 7 Maths Chapter 4 Exercise 4.3

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