a)
[tex]6x = 2x - 8 \\ 4x = - 8 \\ x = - 2[/tex]
b)
[tex]8x = 9 + 5x \\ 3x = 9 \\ x = 3[/tex]
c)
[tex]7x = 2x - 20 \\ 5x = 20 \\ x = 4[/tex]
d)
[tex]2x = 12 - 2x \\ 4x = 12 \\ x = 3[/tex]
e)
[tex]9x = 3x + 12 \\ 6x = 12 \\ x = 2[/tex]
f)
[tex]10x = 4x - 6 \\ 6x = - 6 \\ x = - 1[/tex]
g)
[tex]3x = 9 - 6x \\ 9x = 9 \\ x = 1[/tex]
h)
[tex]5x = 4x + 4 \\ x = 4[/tex]
Myślę że pomogłem ;)