3a - b = 5
b = 3a - 5
$3a=\frac{9}{5}+\frac{15}{11}+\frac{33}{13}$
$b=\frac{4}{5}-\frac{7}{11}+\frac{7}{13}$
Taraf tarafa cikarirsak
$3a-b=1+2+2 \Rightarrow b=3a-5$ elde edilir..