Odpowiedź:
1.
- 3(4 - c) = 4
-12 + 3c = 4
3c = 4 + 12
3c = 16
[tex]c=\frac{16}{3}[/tex]
2.
7(-x - 2) = -5
-7x - 14 = -5
-7x = -5 +14
-7x = 9
[tex]x=-\frac{9}{7}[/tex]
3.
11(3 + 2u) = 0
3 + 2u = 0
2u = -3
[tex]u=-\frac{3}{2}[/tex]
4.
- 6(-8 - 9c) = -5
48 + 54c = -5
54c = -5 - 48
54c = -53
[tex]c=-\frac{53}{54}[/tex]
5.
- 5(2 - 3n) - 8n + 1 = 5
-10 + 15n -8n + 1 = 5
-9 + 7n = 5
7n = 5 + 9
7n = 14
n = 2
