Odpowiedź :
[tex]4(3x - 1) - (2x - 1) = x - (7x - 3) \\ 12x - 4 - 2x + 1 = x - 7x + 3 \\ 10x - 3 = - 6x + 3 \\ 16x = 6 | \div 16 \\ x = \frac{6}{16} = \frac{3}{8} [/tex]
[tex]4(3x - 1) - (2x - 1) = x - (7x - 3) \\ 12x - 4 - 2x + 1 = x - 7x + 3 \\ 10x - 3 = - 6x + 3 \\ 16x = 6 | \div 16 \\ x = \frac{6}{16} = \frac{3}{8} [/tex]