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方程80(x-0.5)=60(x+0.5)怎么解?
人气:472 ℃ 时间:2020-02-05 19:36:45
解答
80(x-0.5)=60(x+0.5)
80x-40=60x+30
80x-60x=30+40
20x=70
x=70/20
x=3.5
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