Is there more context to the question?
Answer:
The answer is she lost 9 matches
Step-by-step explanation:
I need more information to be able to answer
3x-8 = 8x+4
subtract 3x from each side
-8 = 5x+4
subtract 4 from each side
-12 = 5x
divide -12 by 5 to get x
x = -12/5 = -2.4
A prism is what this solid is called