Odpowiedź :
[tex]P = \frac{(6a+2b)\cdot h}{2}\\ \frac{(6a+2b)\cdot h}{2} = 8c /\cdot2\\(6a+2b)h = 16c /:(6a+2b)\\h = \frac{16c}{6a+2b}=\frac{16c}{2(3a+b)}=\frac{8c}{3a+b}[/tex]
[tex]P = \frac{(6a+2b)\cdot h}{2}\\ \frac{(6a+2b)\cdot h}{2} = 8c /\cdot2\\(6a+2b)h = 16c /:(6a+2b)\\h = \frac{16c}{6a+2b}=\frac{16c}{2(3a+b)}=\frac{8c}{3a+b}[/tex]