Answer:
I'm glad that I helped you out
Answer:

Step-by-step explanation:

Since, we are asked to find the value of x . move 15 to right hand side and change its sign.
⇒ 
Add the numbers : 8 and 15
⇒ 
The value of x is 23.
Hope I helped!
Best regards! :D
-TheAnimeGirl
12=9h
12/9=h
4/3=h
4/3 units, or 1 1/3 units