Answer:

Step-by-step explanation:
just means
.
So

Answer:
Step-by-step explanation:
<u>Ratio of corresponding sides of similar triangles are:</u>
<u>Substitute values</u>
- (9+3)/3 = 12/x
- 4 = 12/x
- x = 12/4
- x = 3
Answer: -15 is the simplified answer.
Step-by-step explanation: