Answer:

Step-by-step explanation:
You can start by dividing both sides by 2, getting
.
Answer:
-9 = y
Step-by-step explanation:
-45=5y
Divide each side by 5 to isolate y
-45/5=5y/5
-9 = y
Answer:
I’m pretty sure it 15cm
Step by step
Answer:
126
Step-by-step explanation:
i don't know if it's correct or not