问题 解答题
求未知数:
x.
2
3
x-1=0.9×
2
3
1
9
2
3
=8:x.
答案

(1)

2
3
x-1=0.9×
2
3

      

2
3
x-1+1=0.6+1,

          

2
3
x=1.6,

        

2
3
÷
2
3
=1.6÷
2
3

             x=2.4;

(2)

1
9
2
3
=8:x,

       

1
9
x=
2
3
×
8,

   

1
9
x÷
1
9
=
16
3
÷
1
9

          x=48.

单项选择题
填空题