zad.1
[tex]c=\frac{b}{a} \\ca=b\\a=\frac{b}{c}[/tex]
zad.2
[tex]f=6k-2l\\6k=f+2l\\k=\frac{f+2l}{6}[/tex]
zad.3
[tex]G=x+\frac{1}{3}x\\\frac{1}{3}x=G-v\\x=3(G-v)[/tex]
