Question
Xuan bought some buttons. She gave 13 of the buttons to her brother and sold 37 of the remaining buttons. After that, she bought another 52 buttons and had the same number of buttons that she bought at first. How many buttons did Xuan buy at first?
4 m

Click button first when a symbol is required. X

Xuan bought some buttons. She gave 13 of the buttons to her brother and sold 37 of the remaining buttons. After that, she bought another 52 buttons and had the same number of buttons that she bought at first. How many buttons did Xuan buy at first?