Odpowiedź :
1)
5 * s - 9 = -6
5s - 9 = -6
5s = -6 + 9
5s = 3 / : 5
s = 0,6
2)
7 - 2 * x = 15
7 - 2x = 15
-2x = 15 - 7
-2x = 8 / : (-2)
x = -4
3)
6 * k + 3 = 33
6k + 3 = 33
6k = 33 - 3
6k = 30 / : 6
k = 5
1)
5 * s - 9 = -6
5s - 9 = -6
5s = -6 + 9
5s = 3 / : 5
s = 0,6
2)
7 - 2 * x = 15
7 - 2x = 15
-2x = 15 - 7
-2x = 8 / : (-2)
x = -4
3)
6 * k + 3 = 33
6k + 3 = 33
6k = 33 - 3
6k = 30 / : 6
k = 5