2. 外语
  3. When x is divided by 7, the remainder is What is the remainder when 2x is divided by 7?______

When x is divided by 7, the remainder is What is the remainder when 2x is divided by 7?______

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问题 When x is divided by 7, the remainder is What is the remainder when 2x is divided by 7?______
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答案1
解析 The correct answer is 1. You are given that x divided by 7 leaves a remainder of 4. Assume that 7 goes into x one time with a remainder of 4: x=11. Because x=11, 2x=22. 7 goes into 22 3 times, with a remainder of 1.
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