Page 185 - Mathematics_F1

x = 2 x = 8
3. (a)

x =-6 x = 2
(b)
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1 19
x =- 3 x = 3
(c)

x =-16 x = 8
Tanzania Institute of Education
(d)

1
5. (a) p = 15 (b) r = 6.75 (c) x = − (d) y = 0
1 4
7. (a) x = (b) x = − (c) x =
2
6
4
9. (a) x = 66° (b) x = 47.5°
Exercise 5.6

1. 12 years 7. m = 20 or 28 13. 9
3. 18 and 19 9. 16 15. The number is 4
5. y = 10 11. Daughter 4 years and mother 32 years

Exercise 5.7
1
1. x = 2, y = 7. x = − 1, y = 2 13. u = 2, v = − 2
1
1
4
2
3. x = 4, y = 9. x = 8, y = 15. m = 3 , n = 7
5. x = 3, y = 1 11. x = − 1, y = 3

Exercise 5.8

Mathematics Form One 1. x = 8, y= 2 9. a = 6, y = 10
−
1, b =
3, y =
2
23
3. x=
3
11. x =
12, y =
3
13. x =
5. x =
2, y =
2
2, y =
7. x =
8, y =
15. x =
5
178
25/09/2025 15:02:13
Mathematics form 1.indd 178
Mathematics form 1.indd 178 25/09/2025 15:02:13