Answer:
3x +15 = 8x
5x = 15
x = 3
Step-by-step explanation:
Answer: just multiply 9 and y together: 9 x y
I’m not sure what happened while you were writing this, but if I’m reading it right, “My” has 18 books. If “My” has 3 times as many as 6, that also means 3 times 6, which is 18.