P = AB + BC + ACBC = AB + 8AC = AB + BC - 6 = AB + AB + 8 - 6P = AB + AB + 8 + AB + AB + 8 - 6P = 4AB + 2P = 4 * 5 +2 = 22 cm
P = AB + BC + AC
BC = AB + 8
AC = AB + BC - 6 = AB + AB + 8 - 6
P = AB + AB + 8 + AB + AB + 8 - 6
P = 4AB + 2
P = 4 * 5 +2 = 22 cm