A)
[tex]x + \frac{8}{5} = 20[/tex]
[tex]x = 20 - \frac{8}{5} [/tex]
[tex]x = \frac{100}{5} - \frac{8}{5} [/tex]
[tex]x = \frac{92}{5} [/tex]
[tex]x = 18 \frac{2}{5} [/tex]
B)
[tex]x - \frac{6}{2} = 4[/tex]
[tex]x = 4 + \frac{6}{2} [/tex]
[tex]x = 4 + 3[/tex]
[tex]x = 7[/tex]
C) w załączniku
