2. 外语
  3. If x=15, then 4x- ______ =42

If x=15, then 4x- ______ =42

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问题 If x=15, then 4x- ______ =42
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答案 You are given the value of x, and asked to calculate a missing number in the equation. Because x=15, then 4x=60. The equation is now 60-(some number)=42. The difference between 60 and 42 is 18.
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