Amanda had 7 candy bars. She gave 3 to her sister. The next day, Amanda won some prize money and bought another 30 candy bars. She gave her sister 4 times as many candy bars as she did the first time. How many candy bars did Amanda keep for herself altogether? Let's be accurate as possible.
Amanda has 7 - 3 = 4 candy bars. Amandy gives her sister 4 x 3 = 12 candy bars. She has 30 - 12 = 18 candy bars remaining. In total she keeps 18 + 4 = 22 candy bars.
The answer: 22.