Cześć!
a)
[tex]a+3\frac{5}{9}=4\frac{7}{9}\\\\a=4\frac{7}{9}-3\frac{5}{9}\\\\\boxed{a=1\frac{2}{9}}[/tex]
b)
[tex]b-3\frac{5}{9}=4\frac{2}{9}\\\\b=4\frac{2}{9}+3\frac{5}{9}\\\\\boxed{b=7\frac{7}{9}}[/tex]
c)
[tex]5\frac{1}{12}-c=\frac{7}{12}\\\\c=5\frac{1}{12}-\frac{7}{12}\\\\c=4\frac{13}{12}-\frac{7}{12}=4\frac{6}{12}\\\\\boxed{c=4\frac{1}{2}}[/tex]
