Selina Solutions Concise Maths Class 7 Chapter 12 Simple Linear Equations (Including Word Problems) Exercise 12A contains answers prepared by expert faculty, based on the ICSE exam pattern. The solutions are in a stepwise manner as each step carries marks in the annual exam. Our set of faculty at BYJU’S prepare solutions which are 100% accurate to improve the academic performance of students. Selina Solutions Concise Maths Class 7 Chapter 12 Simple Linear Equations (Including Word Problems) Exercise 12A, free PDF links are given below.
Selina Solutions Concise Maths Class 7 Chapter 12: Simple Linear Equations (Including Word Problems) Exercise 12A Download PDF
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Exercise 12A page: 139
Solve the following questions:
1. x + 5 = 10
Solution:
x + 5 = 10
So we get
x = 10 – 5 = 5
2. 2 + y = 7
Solution:
2 + y = 7
So we get
y = 7 – 2 = 5
3. a – 2 = 6
Solution:
a – 2 = 6
So we get
a = 6 + 2 = 8
4. x – 5 = 8
Solution:
x – 5 = 8
So we get
x = 8 + 5 = 13
5. 5 – d = 12
Solution:
5 – d = 12
So we get
– d = 12 – 5 = 7
d = -7
6. 3p = 12
Solution:
3p = 12
So we get
p = 12/3 = 4
7. 14 = 7m
Solution:
14 = 7m
So we get
m = 14/7 = 2
8. 2x = 0
Solution:
2x = 0
So we get
x = 0/2 = 0
9. x/9 = 2
Solution:
x/9 = 2
So we get
x = 2 × 9 = 18
10. y/-12 = -4
Solution:
y/-12 = -4
So we get
y = -4 × -12 = 48
11. 8x – 2 = 38
Solution:
8x – 2 = 38
So we get
8x = 38 + 2
8x = 40
x = 40/8 = 5
12. 2x + 5 = 5
Solution:
2x + 5 = 5
So we get
2x = 5 – 5
2x = 0
x = 0/2 = 0
13. 5x – 1 = 74
Solution:
5x – 1 = 74
So we get
5x = 74 + 1
5x = 75
x = 75/5 = 15
14. 14 = 27 – x
Solution:
14 = 27 – x
So we get
x = 27 – 14 = 13
15. 10 + 6a = 40
Solution:
10 + 6a = 40
So we get
6a = 40 – 10
6a = 30
a = 30/6 = 5
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