Hello! :)
Answer:

<u><em>*The answer must have A NEGATIVE SIGN ONLY!*</em></u>
Step-by-step explanation:
First, you subtract by 15 from both sides of an equations.

Subtract numbers from left/right.


Then, you subtract by 8x both sides of an equation.

Simplify.

Divide by -5 from both sides of an equation.

Divide by the numbers from left/right.

, <em>is the CORRECT/FINAL ANSWER!</em>
<em>Hope this helps you! </em>
<em>Have a nice day! :)</em>
<em>:D</em>
<em>-Charlie</em>
<em>Thanks!</em>