Odpowiedź:
[tex]3x - 4 = 4 - 3x \\ 3x + 3x = 4 + 4 \\ 6x = 8 \\ x = 8 - 6 = 2 \\ \\ 5x = 0 \\ x = 0 \div 5 \\ \\ 0.5(8 + 2x) = x + 4 \\ 4.0 + 1.0 = x + 4 \\ x = 4 + 4 + 1 \\ x = 9[/tex]
[tex]4x + 1 = 4(x + 1) \\ 4x + 1 = 4x + 4 \\ 4x - 4x = 4 - 1 \\ x = 3[/tex]