Explicație pas cu pas:
a)
[tex]5x - 2 = 2x + 7 \\ 5x - 2x = 7 + 2 \\ 3x = 9 \ \Big|_{:3} \implies \bf x = 3[/tex]
b)
[tex]3x + 5 = 4x - 8 \\ 3x - 4x = - 8 - 5 \\ - x = - 13 \ \Big|_{:(-1)} \implies \bf x = 13[/tex]
c)
[tex]6 - 2x = - 7x + 21 \\ - 2x + 7x = 21 - 6 \\ 5x = 15 \ \Big|_{:5} \implies \bf x = 3[/tex]
d)
[tex] - 4x + 5 = 4x - 27 \\ - 4x - 4x = - 27 - 5 \\ - 8x = - 32 \ \Big|_{:(-8)} \implies \bf x = 4[/tex]
e)
[tex] - 2x + 5 = - 3x + 4 \\ - 2x + 3x = 4 - 5 \\ \implies \bf x = - 1[/tex]
f)
[tex] - 8 - 14x = 2x - 8 \\ - 14x - 2x = - 8 + 8 \\ - 16x = 0 \implies \bf x = 0[/tex]
