Explicație pas cu pas:
c)
[tex]3x(x - 1) - 17 = x(1 + 3x) + 1[/tex]
[tex]3x {}^{2} - 3x - 17 = x + 3x {}^{2} + 1[/tex]
[tex]3x {}^{2} - 3x {}^{2} - 3x - x = 1 + 17[/tex]
[tex] - 4x = 18[/tex]
[tex]x = - \frac{18}{4} [/tex]
[tex]x = - \frac{9}{2} [/tex]
f)
[tex]3(x + 3) + x = 9 + 4x[/tex]
[tex]3x + 9 + x = 9 + 4x[/tex]
[tex]4x - 4x = 9 - 9[/tex]
[tex] = 0[/tex]
i)
[tex]2(x + 1) - 1 = 3 - (1 - 2x)[/tex]
[tex]2x + 2 - 1 = 3 - 1 + 2x[/tex]
[tex]2x - 2x = 3 - 1 + 1[/tex]
[tex]2x - 2x = 3[/tex]
[tex] = 0[/tex]
