三分之二X加二分之一X等于四十二
人气：443 ℃ 时间：2019-11-15 02:53:51
解答
2/3X+1/2X=42
4/6X+3/6X=42
7/6X=42
X=42÷7/6
X=42×6/7
X=36
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