Odpowiedź:
j)
5 * s - 9 = - 6
5 *s = - 6 + 9
5 * s = 3
s = 3/5
k)
7 - 2 *x = 15
- 2 * x = 15 - 7
- 2 * x = 8
2 * x = - 8
x = - 8/2 = - 4
l)
6 * k + 3 = 33
6 *k =33 -3
6 * k = 30
k = 30/6 = 5
