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数学
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11x+4x=12 0.5x-3.8=6怎做
人气：143 ℃ 时间：2020-03-29 12:54:28
解答
11x+4x=12
15X=12
5X=4
X=0.8
0.5x-3.8=6
0.5X=9.8
5X=98
X=19.6
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