Odpowiedź :
[tex]3 - (2x + 1) = 0 \\ 3 - 2x - 1 = 0 \\ - 2x = - 2 \\ x = 1[/tex]
[tex](x - 1) - (3x - 5) = 0 \\ x - 1 - 3x + 5 = 0 \\ - 2x = - 4 \\ x = 2[/tex]
[tex]3(1 - x) - (1 - 2x) = 9 \\ 3 - 3x - 1 + 2x = 9 \\ - x = 7 \\ x = - 7[/tex]
[tex]3 - (2x + 1) = 0 \\ 3 - 2x - 1 = 0 \\ - 2x = - 2 \\ x = 1[/tex]
[tex](x - 1) - (3x - 5) = 0 \\ x - 1 - 3x + 5 = 0 \\ - 2x = - 4 \\ x = 2[/tex]
[tex]3(1 - x) - (1 - 2x) = 9 \\ 3 - 3x - 1 + 2x = 9 \\ - x = 7 \\ x = - 7[/tex]