a)
[tex]3x - 4 = 8 \\ 3x = 12 \\ x = 4[/tex]
b)
[tex]3 - 0.5x = 1.5x + 4 \\ - 1 = 2x \\ x = - \frac{1}{2} [/tex]
c)
[tex] \frac{2x + 4}{3} = 2x - 2 | \times 3 \\ 2x + 4 = 6x - 6 \\ - 4x = - 10 \\ x = \frac{10}{4} = 2 \frac{2}{4} = 2 \frac{1}{2} [/tex]
Myślę że pomogłem ;)
