Odpowiedź :
Odpowiedź:
a) 9x - 7x = 4 + 6
2x = 10 /:2
x = 5
b) 2x - 3x - 4x - x = 7 - 7
2x - 8x = 0
- 6x = 0 /+ 6
x = 6
c)2x + x - 4x = -7 + 4
-1x = -3 /+ 1
x = -2
d) 4x + x - x = 12 + 3 - 7
4x = 8 / - 4
x = 4
e) 2x + 5x - 4x = 2 + 3 + 3
3x = 8 /- 3
x = 5