C.) is the correct answer! I’m 100% sure!
Answer:
A
Step-by-step explanation:
you have to times the number number of discs a box holds by the number of boxes
1. combine like terms (2x and -7x) to create -5x
2. subtract 5 from each side to create: -5x=10
3. divide both sides by -5
4. x=-2
