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解方程:17-x=0.731625÷x=40x+30%=5250%-33%=34x-38x=57215x+16x=25.

题目详情
解方程:
17-x=0.73
16
25
÷x=40
x+30%=52
50%-33%=34 x-
3
8
x=
5
7
2
15
x+
1
6
x=
2
5
▼优质解答
答案和解析
(1)17-x=0.73,
       17-x+x=0.73+x,
           17=0.73+x,
      17-0.73=0.73+-0.73,
            x=16.27;

(2)
16
25
÷x=40,
 
16
25
÷x×x=40×x,
       
16
25
=40x,
    
16
25
÷40=40x÷40,
          x=
2
125


(3)x+30%=52,
 x+30%-30%=52-30%,
         x=51.7;

(4)50%x-33%x=34,
          17%x=34,
     17%x÷17%=34÷17%,
             x=200;

(5)x-
3
8
x=
5
7

      
5
8
x=
5
7

   
5
8
5
8
=
5
7
÷
5
8

         x=
8
7


(6)
2
15
x+
1
6
x=
2
5

        
3
10
x=
2
5

   
3
10
3
10
=
2
5
÷
3
10

            x=
4
3