Answer:
The answer is 11, I think, hope this helps!
Step-by-step explanation:
It is wrong because the equation is missing parentheses around the sum
When it says "the quantity of..." it always means parentheses. The correct equation is 2(3x+4)
Answer: right
Step-by-step explanation:
Subtract original amount from new amount:
84 - 39 = 45
He bought 45 books.
