问题 解答题
解方程.
(1)4x+18=50              (2)
1
4
1
8
=x:
1
10
              (3)
17
3
=
51
X
              (4)
3.2
X
=0.5.
答案

(1)4x+18=50,

      4x+18-18=50-18,

         4x÷4=32÷4,

             x=8;

(2)

1
4
1
8
=x:
1
10

        

1
8
x=
1
4
×
1
10

       

1
8
x8=
1
40
×
8,

           x=

1
5

(3)

17
3
=
51
X

     17x=3×51,

 17x÷17=153÷17,

       x=9;

(4)

3.2
X
=0.5,

 

3.2
X
×x=0.5×x,

0.5x÷0.5=3.2÷0.5,

        x=6.4.

选择题
单项选择题