Odpowiedź:
a) 5x - 3 + 2x = 4x + 9
5x + 2x - 4x = 9 + 3
3x = 12 /: 3
x = 4
b) 8x - 6 - 9x = 5x - 6
8x - 9x - 5x = -6 + 6
-6x = 0
x = 0
c) 2 + 4x - 1 + 2x = -8 + 4x - 7
4x + 2x - 4x = -8 - 7 - 2 + 1
2x = -16 /: 2
x = -8
d) -3 + 7x - 2 = 3x - 11 + 6x
7x - 3x - 6x = -11 + 3 + 2
-2x = -6 /: (-2)
x = 3
e) 4 + 5x - 2 = 7x - 7
5x - 7x = -7 - 4 + 2
-2x = -9 /: (-2)
x = 4,5
f) -8 + 7x + 3 = 5x + 4 + 4x + 5
7x - 5x - 4x = 4 + 5 + 8 - 3
-2x = 14 /: (-2)
x = -7
Pozdrawiam.
