The length of the bottom side of the triangle is 8cm, for the other side it is 2 times less than the length of the first, and the length

The length of the bottom side of the triangle is 8cm, for the other side it is 2 times less than the length of the first, and the length of the third side is 6cm less than the sum of the lengths of the first two sides. Find the perimeter of the triangle.

1) If the length of the first side is 8cm, and the second is half as long, then the length of the second side is 8: 2 = 4 (cm)
2) The third side is 6cm less than the sum of the other two sides. Amount: 4 + 8 = 12 (cm). Side then: 12-6 = 6 (cm)
3) The perimeter is the sum of the lengths of all sides, so the perimeter is 4 + 8 + 6 = 18 (cm)
Answer: 18cm