Equations in letters:

(x - 3a) (x + 5)=0

x=
and how to solve that ,thanks​

The right answer is x=-5

You have 2 sides that are 2 cms and you have 6 sides that are 1/2 cm and you have 4 sides that are 1 cm. the smallest sides are 1/2 the medium sized sides are 1 and the smallest are 1/2. so to find the perimeter you have to add them all up together so your answer will be 11 cm's