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1.7x-120%x=6.5
人气:175 ℃ 时间:2020-02-05 16:44:05
解答
初一的吧
1.7x-120%x=6.5
1.7x-1.2x =6.5
0.5x =6.5
x =6.5除以0.5
x =1.3
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