Odpowiedź:
a) 12-9=x 12-9=3 3=x
b) 6+8=s 6+8=14 s=14
c) 36:4=k 36:4=9 k=9
d) 10+4=2p 10+4=14 14=2p |:2 7=p
A) x + 9 = 12
x = 12 - 9
x = 3
B) s - 8 = 6
s = 6 + 8
s = 14
C) k * 4 = 36 /: 4
k = 9
D) 2p - 4 = 10
2p = 10 + 4
2p = 14 /: 2
p = 7
E) 4 + 5x - 2 = 7x - 7
5x - 7x = 2 - 4 - 7
-2x = - 9 /: (-2)
x = 4,5
