Odpowiedź:
- 2x + 4(x + 2) = 8
- 2x + 4x + 8 = 8
2x = 8 - 8 =0
x = 0 T
4x = 3x
4x - 3x = 0
x = 0 T
2(x + 3) - x = 4x
2x + 6 - x = 4x
x + 6 = 4x
x - 4x = - 6
- 3x = - 6
3x = 6
x = 6/2 = 3 N
2x - 9 = 2(x - 3) - 3
2x - 9 = 2x - 6 - 3
2x - 9 = 2x - 9
2x - 2x = - 9 + 9
0 = 0
Równanie tożsamościowe ; x ∈ R więc 0 jest rozwiązaniem równania T
(5x - 3)/14 = 1/2
2(5x - 3) = 14
10x - 6 = 14
10x = 14 + 6 = 20
x = 20/10 = 2 N
