Odpowiedź :
a:
[tex]c = ak + bk / - bk\\c - bk = ak /:k\\\frac{c - bk}{k} = a[/tex]
b:
[tex]c = ak + bk / - ak\\c - ak = bk / : k\\\frac{c - ak}{k} = b[/tex]
a:
[tex]c = ak + bk / - bk\\c - bk = ak /:k\\\frac{c - bk}{k} = a[/tex]
b:
[tex]c = ak + bk / - ak\\c - ak = bk / : k\\\frac{c - ak}{k} = b[/tex]