Răspuns :
[tex]3x - 0.6 = 1.8x \\ 1.2x = 0.6 \\ x = \frac{0.6}{1.2} \\ \\ x { = \frac{1}{2} }[/tex]
[tex]4x - 2x + 7 = 2x - 2(x - 1) \\ 2x + 7 = 2x - 2x + 2 \\ 2x + 7 = 2 \\ 2x = -5 \\ x = - \frac{5}{2} [/tex]
[tex]4x - 2x + 7 = 2x - 2(x - 1) \\ 2x + 7 = 2x - 2x + 2 \\ 2x + 7 = 2 \\ 2x = -5 \\ x = - \frac{5}{2} [/tex]