Answer:

Step-by-step explanation:

Perimeter of a triangle = all 3 sides added together
x + (x - 4) + (x - 4) = 19
3x - 8 = 19
3x = 19 + 8
3x = 27
x = 27/3
x = 9 <==
I think that 30 bulbs are expected to be defective.
Answer: the answer = work for it
Step-by-step explanation: