问题 解答题
解方程
3
4
x-1.4=3.6+
2
3
x                                
 1.2:
2
3
=
x
5
答案

(1)

3
4
x-1.4=3.6+
2
3
x,

    

3
4
x-1.4-
2
3
x=3.6+
2
3
x-
2
3
x,

       

1
12
x-1.4=3.6,

    

1
12
x-1.4+1.4=3.6+1.4,

            

1
12
x=5,

        

1
12
x÷
1
12
=5÷
1
12

                x=60,

(2)1.2:

2
3
=
x
5

       

2
3
x=1.2×5,

       

2
3
x=6,

    

2
3
x÷
2
3
=6÷
2
3

         x=9.

单项选择题
单项选择题