[tex]12x = - 3 | \div 12 \\ x = - \frac{3}{12} \\ x= - \frac{1}{4} [/tex]
[tex]x + 8 = x - 3 \\ x - x = - 3 - 8 \\ 0 = - 11 \\ rownanie \: sprzeczne \: \\ brak \: rozwiazan[/tex]
[tex]2x + 5 = 4x - 15 \\ 2x - 4x = - 15 - 5 \\ - 2x = - 20 | \div ( - 2) \\ x = 10[/tex]
[tex]2(x - 1) = 3x + 2 \\ 2x - 2 = 3x + 2 \\ 2x - 3x = 2 +2 \\ - x = 4 | \times ( - 1) \\ x = - 4[/tex]
[tex] \frac{1}{2} x + 3 = \frac{1}{3} x + \frac{1}{6} | \times 6 \\ 3x + 18 = 2x + 1 \\ 3x - 2x = 1 - 18 \\ x = 17[/tex]
[tex](x - 1)(x + 2) = {x}^{2} + 2 \\ {x}^{2} + 2x - x - 2 = {x}^{2} + 2 \\ {x}^{2} - {x}^{2} - x = 2 + 2 \\ - x = 4 | \times ( - 1) \\ x = - 4[/tex]
