Odpowiedź:
a)
2x = 4 |: 2
x = 2
b)
2x + 3 = 7
2x = 7 - 3
2x = 4 |: 2
x = 2
c)
3x + 3 = x + 7
3x - x = 7 - 3
2x = 4 |: 2
x = 2
d)
x = 2
e)
3x = x + 4
3x - x = 4
2x = 4 |: 2
x = 2
f)
2x + 1 = 5
2x = 5 - 1
2x = 4 |: 2
x = 2
Odp: 1 worek waży 2kg
Liczę na naj :3