Exercise 2.1
Solve the following equations.
1. x - 2 = 7
Solution:
x - 2 = 7
x = 7 + 2
x = 9
2. y + 3 = 10
Solution:
y + 3 = 10
y = 10 - 3
y = 7
3. 6 = z + 2
Solution:
6 = z + 2
z = 6 - 2
z = 4
Solution:
5. 6x = 12
Solution:
x = 12/6
x = 2
Solution:
t = 3 × 10
t = 30
7. 2x + 3 = 18
Solution:
2x = 18 - 3
2x = 15
x = 15/2
x = 7.5
Solution:
x = 1.6 × 1.5
x = 2.4
9. 7x - 9 = 16
Solution:
7x = 16 + 9
7x = 25
x = 25/7
x = 3.5
10. 14x - 8 = 13
Solution:
14x = 13 + 8
14x = 21
x = 21/14 = 3/2 = 1.5
11. 17 + 6p = 9
Solution:
6p = 9 - 17
6p = -8
p = -8/6 = - 1.3
Solution:
