题目内容

解方程.
(1+
1
4
)x=250
x-
3
8
x
=
5
3

(1-
1
4
-
1
5
)x=550.
(1)(1+
1
4
)x=250,
             
5
4
x=250,
          
5
4
x÷
5
4
=250÷
5
4

               x=200;

(2)x-
3
8
x=
5
3

      
5
8
x=
5
3

    
5
8
x÷
5
8
=
5
3
÷
5
8

         x=2
2
3


(3)(1-
1
4
-
1
5
)x=550,
            
11
20
x=550,
        
11
20
x÷
11
20
=550÷
11
20

               x=1000.
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