[tex]\displaystyle f+b=32 \\ f=60\% \ din \ b \\ -------- \\ f= \frac{60}{100} \cdot b \to \boxed{f= \frac{3}{5}b} \\ \\ \frac{3}{5} b+b=32 \\ \\ \text{Se aduce la acelasi numitor.} \\ \\ 3b+5b=
160 \\ \\ 8b=160 \\ \\ b=160:8=20 \\ \\ f+20=32 \\ f=12[/tex]
