Odpowiedź :
Rozwiąż równania.
a) 4x - 7 = 2x + 9
4x - 2x = 9 + 7
2x = 16|: 2
x = 8
b) 3 - 8x = 18x - 3x
-8x -18x + 3x = -3
-23x = -3|: (-23)
x = 3/23
c) 2 - x = 12 + 7x
-x - 7x = 12 -2
-8x = 10|: 8
x = 10/8
x = 5/4
x = 1 1/4
d) 3x + 5x - 6 = 6x + 2
3x + 5x - 6x = 2 + 6
2x = 8|: 2
x = 4
e) 5 - 9x + 6 = 2x + 14 - x
-9x - 2x +x = 14 - 5 - 6
-10x = 3|: (-10)
x = -3/10