80-x+15=70,34-5x+48=10.6怎么写
人气:457 ℃ 时间:2020-04-10 18:18:20
解答
1、X=80-70+15
=10+15
=25
2、34+48-10.6=5X
82-10.6=5X
71.4=5X
X=71.4/5
X=14.28
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