Answer:
x=14,-14
hope this is fast enough!
C. would be my educated guess! I really hope this helps
To do this problem, we could set up an equation by putting 15% into a decimal.
90 coins * 0.15 = amount of coins sold
13.5=amount of coins sold
You sold 13.5 coins.
This is true. Test it, 10 is divisible by 5 and 10. 20 is divisible by 5 and 10. If you continue you will see this to be true.
