Question
Xavier had 1172 tablets and some headphones in his shop. After selling 210 tablets and buying another 120 headphones, he had the same number of tablets and headphones. How many headphones did Xavier have at first?
4 m

Click button first when a symbol is required. X

Xavier had 1172 tablets and some headphones in his shop. After selling 210 tablets and buying another 120 headphones, he had the same number of tablets and headphones. How many headphones did Xavier have at first?