Odpowiedź:
1/5u × 5 = u
4x × 1/4 = x
-8y × 5/8 = -5y
0,6z : 2 = 0,3z
3x × 5 = 15x
- 7y : (-7) = y
-8z : (-4) = 2z
1/6u × 6 = u
