Odpowiedź:
1.
a) x - 5
b) 2 * (- 1z) = - 2z
2.
b) 4c + 10 = 4 * 3 + 10 = 12 + 10 = 22
3.
a) 2x + 5x = 7x
b) 2c - 6c = - 4c
4.
3x = 6
x = 6/3 = 2
5.
a)
2x + 4 = 24
2x = 24 - 4 = 20
x = 20/2 = 10
b)
25 : b = 6
25 = 6b
b = 25/6 = 4 1/6
c)
5 * z = 600
z = 600/5 = 120