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解方程30%X+50%X=1525-10%X=590%X-20%=125%90%X÷23=5675%÷25%X=20%60%X-35%X=0.5(1.5+2.5)X=1023X-12=7520%-36%X=40%25:7=X:35514:35=57:x23:X=12:14.

题目详情
解方程
30%X+50%X=15 25-10%X=5 90%X-20%=125% 90%X÷
2
3
=
5
6
75%÷25%X=20% 60%X-35%X=0.5 (1.5+2.5)X=10
2
3
X-
1
2
=
7
5
20%-36%X=40% 25:7=X:35 514:35=57:x 23:X=12:14.
30%X+50%X=15 25-10%X=5 90%X-20%=125% 90%X÷
2
3
=
5
6
75%÷25%X=20% 60%X-35%X=0.5 (1.5+2.5)X=10
2
3
X-
1
2
=
7
5
20%-36%X=40% 25:7=X:35 514:35=57:x 23:X=12:14.
30%X+50%X=15 25-10%X=5 90%X-20%=125% 90%X÷
2
3
=
5
6
30%X+50%X=1525-10%X=590%X-20%=125%90%X÷
2
3
=
5
6
2
3
=
5
6
2
3
2233
5
6
5
6
5566 75%÷25%X=20% 60%X-35%X=0.5 (1.5+2.5)X=10
2
3
X-
1
2
=
7
5
75%÷25%X=20%60%X-35%X=0.5(1.5+2.5)X=10
2
3
X-
1
2
=
7
5
2
3
X-
1
2
=
7
5
2
3
2233
1
2
=
7
5
1
2
1122
7
5
7
5
7755 20%-36%X=40% 25:7=X:35 514:35=57:x 23:X=12:14.20%-36%X=40%25:7=X:35514:35=57:x23:X=12:14.
▼优质解答
答案和解析
(1)30%x+50%x=15,

              80%x=15,

          80%x÷80%=15÷80%,
                  x=
75
4


(2)25-10%x=5,

25-10%x+10%x=5+10%x,

    5+10%x-5=25-5,

   10%x÷10%=20÷10%,

           x=200;


(3)90%X-20%=125%,

 90%X-20%+20%=125%+20%,

    90%X÷90%=145%÷90%,
            x=
29
18



(4)90%X÷
2
3
=
5
6
  90%X÷
2
3
×
2
3
=
5
6
×
2
3

    90%X÷90%=
5
9
÷90%,
            x=
50
81



(5)75%÷25%X=20%,

75%÷25%X×25%x=20%×25%x,

 20%×25%x÷20%=75%÷20%,
      25%x÷25%=
15
4
÷25%,
(1)30%x+50%x=15, (1)30%x+50%x=15,(1)30%x+50%x=15,
              80%x=15,

          80%x÷80%=15÷80%,
                  x=
75
4


(2)25-10%x=5,

25-10%x+10%x=5+10%x,

    5+10%x-5=25-5,

   10%x÷10%=20÷10%,

           x=200;


(3)90%X-20%=125%,

 90%X-20%+20%=125%+20%,

    90%X÷90%=145%÷90%,
            x=
29
18



(4)90%X÷
2
3
=
5
6

              80%x=15,

          80%x÷80%=15÷80%,
                  x=
75
4


(2)25-10%x=5,

25-10%x+10%x=5+10%x,

    5+10%x-5=25-5,

   10%x÷10%=20÷10%,

           x=200;


(3)90%X-20%=125%,

 90%X-20%+20%=125%+20%,

    90%X÷90%=145%÷90%,
            x=
29
18



(4)90%X÷
2
3
=
5
6

              80%x=15,

          80%x÷80%=15÷80%,
                  x=
75
4


(2)25-10%x=5,

25-10%x+10%x=5+10%x,

    5+10%x-5=25-5,

   10%x÷10%=20÷10%,

           x=200;


(3)90%X-20%=125%,

 90%X-20%+20%=125%+20%,

    90%X÷90%=145%÷90%,
            x=
29
18



(4)90%X÷
2
3
=
5
6
75
4
757575444;

(2)25-10%x=5,

25-10%x+10%x=5+10%x,

    5+10%x-5=25-5,

   10%x÷10%=20÷10%,

           x=200;


(3)90%X-20%=125%,

 90%X-20%+20%=125%+20%,

    90%X÷90%=145%÷90%,
            x=
29
18



(4)90%X÷
2
3
=
5
6
29
18
292929181818;


(4)90%X÷
2
3
=
5
6
2
3
222333=
5
6
5
6
555666,   90%X÷
2
3
×
2
3
=
5
6
×
2
3

    90%X÷90%=
5
9
÷90%,
            x=
50
81



(5)75%÷25%X=20%,

75%÷25%X×25%x=20%×25%x,

 20%×25%x÷20%=75%÷20%,
      25%x÷25%=
15
4
÷25%,
  90%X÷
2
3
×
2
3
=
5
6
×
2
3

    90%X÷90%=
5
9
÷90%,
            x=
50
81



(5)75%÷25%X=20%,

75%÷25%X×25%x=20%×25%x,

 20%×25%x÷20%=75%÷20%,
      25%x÷25%=
15
4
÷25%,
  90%X÷
2
3
×
2
3
=
5
6
×
2
3

    90%X÷90%=
5
9
÷90%,
            x=
50
81



(5)75%÷25%X=20%,

75%÷25%X×25%x=20%×25%x,

 20%×25%x÷20%=75%÷20%,
      25%x÷25%=
15
4
÷25%,
2
3
222333×
2
3
=
5
6
×
2
3

    90%X÷90%=
5
9
÷90%,
            x=
50
81



(5)75%÷25%X=20%,

75%÷25%X×25%x=20%×25%x,

 20%×25%x÷20%=75%÷20%,
      25%x÷25%=
15
4
÷25%,
2
3
222333=
5
6
×
2
3

    90%X÷90%=
5
9
÷90%,
            x=
50
81



(5)75%÷25%X=20%,

75%÷25%X×25%x=20%×25%x,

 20%×25%x÷20%=75%÷20%,
      25%x÷25%=
15
4
÷25%,
5
6
555666×
2
3

    90%X÷90%=
5
9
÷90%,
            x=
50
81



(5)75%÷25%X=20%,

75%÷25%X×25%x=20%×25%x,

 20%×25%x÷20%=75%÷20%,
      25%x÷25%=
15
4
÷25%,
2
3
222333,
    90%X÷90%=
5
9
÷90%,
            x=
50
81



(5)75%÷25%X=20%,

75%÷25%X×25%x=20%×25%x,

 20%×25%x÷20%=75%÷20%,
      25%x÷25%=
15
4
÷25%,
5
9
555999÷90%,
            x=
50
81



(5)75%÷25%X=20%,

75%÷25%X×25%x=20%×25%x,

 20%×25%x÷20%=75%÷20%,
      25%x÷25%=
15
4
÷25%,
50
81
505050818181;


(5)75%÷25%X=20%,

75%÷25%X×25%x=20%×25%x,

 20%×25%x÷20%=75%÷20%,
      25%x÷25%=
15
4
÷25%,
15
4
151515444÷25%, x=15;

(6)60%X-35%X=0.5,
          25%x=0.5,
     25%x÷25%=0.5÷25%,
             x=2;

(7)(1.5+2.5)X=10,
            4x÷4=10÷4,
                x=
5
2


(8)
2
3
X-
1
2
=
7
5

 
2
3
X-
1
2
+
1
2
=
7
5
+
1
2

    
2
3
x÷
2
3
=
19
10
÷
2
3

         x
5
2
555222;

(8)
2
3
X-
1
2
=
7
5

 
2
3
X-
1
2
+
1
2
=
7
5
+
1
2

    
2
3
x÷
2
3
=
19
10
÷
2
3

         x
2
3
222333X-
1
2
=
7
5

 
2
3
X-
1
2
+
1
2
=
7
5
+
1
2

    
2
3
x÷
2
3
=
19
10
÷
2
3

         x
1
2
111222=
7
5

 
2
3
X-
1
2
+
1
2
=
7
5
+
1
2

    
2
3
x÷
2
3
=
19
10
÷
2
3

         x
7
5
777555,
 
2
3
X-
1
2
+
1
2
=
7
5
+
1
2

    
2
3
x÷
2
3
=
19
10
÷
2
3

         x
2
3
222333X-
1
2
+
1
2
=
7
5
+
1
2

    
2
3
x÷
2
3
=
19
10
÷
2
3

         x
1
2
111222+
1
2
=
7
5
+
1
2

    
2
3
x÷
2
3
=
19
10
÷
2
3

         x
1
2
111222=
7
5
+
1
2

    
2
3
x÷
2
3
=
19
10
÷
2
3

         x
7
5
777555+
1
2

    
2
3
x÷
2
3
=
19
10
÷
2
3

         x
1
2
111222,
    
2
3
x÷
2
3
=
19
10
÷
2
3

         x
2
3
222333x÷
2
3
=
19
10
÷
2
3

         x
÷
2
3
222333=
19
10
÷
2
3

         x
19
10
191919101010÷
2
3

         x
÷
2
3
222333,
         x