0.7分之x-0.03分之0.17-0.2x=1
人气：120 ℃ 时间：2020-02-06 11:24:41
解答
0.7分之x-0.03分之0.17-0.2x=1
3x-7(1.7-2x)=2.1
17x-11.9=2.1
x=14/17
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