Explicație pas cu pas:
a)
[tex]2x + 3 = x - 5 \\ 2x - x = - 5 - 3 \\ \implies \bf x = - 8[/tex]
b)
[tex]5x - 6 = 7 + 2x \\ 5x - 2x = 7 + 6 \\ 3x = 13 \implies \bf x = \frac{13}{3} [/tex]
c)
[tex]8x + 2x + 11 = 20 - x \\ 10x + x = 20 - 11 \\ 11x = 9 \implies \bf x = \frac{9}{11} [/tex]
d)
[tex]4x + 1 = 6x - 3 \\ 4x - 6x = - 3 - 1 \\ - 2x = - 4 \implies \bf x = 2[/tex]
e)
[tex]2(x - 1) + 1 = x + 8 \\ 2x - 2 + 1 = x + 8 \\ 2x - 1 = x + 8 \\ 2x - x = 8 + 1 \implies \bf x = 9[/tex]
f)
[tex]5x - (x - 1) = 9 - 4x \\ 5x - x + 1 = 9 - 4x \\ 4x + 1 = 9 - 4x \\ 4x + 4x = 9 - 1 \\ 8x = 8 \implies \bf x = 1[/tex]
