Odpowiedź:
a) 2x + x = 12 + 5
3x = 17 /:3
x = 17/3
b) 5x - 7x = -9 - 8
-2x = -17 /:(-2)
x = 17/2
c) 4x - 6x = 3 - 2 - 2
-2x = 1 /:(-2)
x = -1/2
d) 5x - 2x - 9x = 3 - 4
-6x = -1 /:(-6)
x = 1/6
e)4x - 3x - 11x = 5 - 7
-10x = -2 /:(-10)
x = 10/2
x= 5
