Replace each question mark with one of the four mathematical signs: +, -, x, or /(divide). Each sign can be used only once.

Question

7?5?4?7?6=15

P.S. YOU HAVE TO USE THE ORDER OF OPERATIONS

Mrs. B. · Answer

[(7+5)/4]x7-6

drwls · Answer

Mrs. B is correct and also added parentheses and brackets, which are necessary to clarify the order of operations. The problem should have made that clear.