Explicación paso a paso:
A)
[tex]8x = 4x - 8 \\ 8x - 4x = - 8 \\ 4x = - 8 \\ x = - \frac{8}{4} \\ x = - 2[/tex]
B)
[tex]x - 4 = - 1 \\ x = - 1 + 4 \\ x = 3[/tex]
C)
[tex]4x + 5 = 12 + 3x \\ 4x - 3x = 12 - 5 \\ x = 7[/tex]
D)
[tex]4 = x + 4 \\ x = 4 - 4 \\ x = 0[/tex]
E)
[tex]4x - 12 > 20 \\ 4x > 20 + 12 \\ 4x > 32 \\ x > \frac{32}{4} \\ x > 8[/tex]
F)
[tex]2x - 6 < 4 \\ 2x < 4 + 6 \\ 2x < 10 \\ x < \frac{10}{2} \\ x < 5[/tex]
G)
[tex]4x + 2 < 2x - 3 \\ 4x - 2x < - 3 - 2 \\ 2x < - 5 \\ x < - \frac{5}{2} [/tex]
H)
[tex]3x + 7 > 5x - 1 \\ 7 + 1 > 5x - 3x \\ 8 > 2x \\ \frac{8}{2} > x \\ 4 > x[/tex]
