Odpowiedź :
[tex]7(3 - 2x) - (3 - 4x) = 2x - (4x + 6) \\ 21 - 14x - 3 + 4x = 2x - 4x - 6 \\ 18 - 10x = - 2x - 6 \\ - 8x = - 24 | \div ( - 8) \\ x = 3[/tex]
[tex]7(3 - 2x) - (3 - 4x) = 2x - (4x + 6) \\ 21 - 14x - 3 + 4x = 2x - 4x - 6 \\ 18 - 10x = - 2x - 6 \\ - 8x = - 24 | \div ( - 8) \\ x = 3[/tex]