作业帮 > 数学 > 作业

求X.6+[0.5×45+(235−X)×9]÷4=22

来源:学生作业帮 编辑:作业帮 分类:数学作业 时间:2024/11/07 18:35:24
求X.6+[0.5×
4
5
+(2
3
5
−X)×9]÷4=22
6+[0.5×
4
5+(2
3
5-x)×9]÷4=22,
6+[0.5×0.8+(2
3
5-x)×9]÷4-6=22-6,
[0.5×0.8+(2
3
5-x)×9]÷4=16,
[0.4+(2
3
5-x)×9]÷4×4=16×4,
              0.4+(2
3
5-x)×9=64,
          0.4+(2
3
5-x)×9-0.4=64-0.4,
                  (2
3
5-x)×9=63.6,
               (2
3
5-x)×9÷9=63.6÷9,
                         2
3
5-x=
106
15,
                       2
3
5-x+x=
106
15+x,
                       
106
15+x=2
3
5,
                  
106
15+x-
106
15=2
3
5-
106
15,
                             x=-4
7
15.