Describir: Understanding transactions /

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 | [] ||   | ||__     / . \\   | \_/ || |  /\  ||  | \_/ ||   | [] || 
 |  __//   |_____||  /_//\_\\   \___//  |_// \_||   \___//     \__ || 
 |_|`-`    `-----`   `-`  --`   `---`   `-`   `-`   `---`       -|_|| 
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