[tex]a+b=80 \\\\\\ 20\% \ din \ a= 30\% \ din \ b \\\\ \frac{\not 20}{\not 100}*a=\frac{\not 30}{\not 100}*b \\\\ \frac{1}{5}*a= \frac{3}{10} *b \\\\ a= \frac{3b}{\not 10}*\not 5 \\\\ a=\frac{3b}{2} \\\\\\ \frac{3b}{2}+b^{(2}=80^{(2} \\\\ 3b+2b=80*2 \\\\ 5b=80*2 \\\\ b=\frac{\not 80*2}{\not 5} \\\\ b=16*2 \\\\ \boxed{b=32} \\\\\\ a=\frac{3*\not 32}{\not 2} \\\\ a=3*16 \\\\ \boxed{a=48}[/tex]
