解方程.40%X+60%=5 (1+56)X=1120 5X-3×710=75 4:x=12

解方程.40%X+60%=5 (1+56)X=1120 5X-3×710=75 4:x=12.
2025-01-24 09:32:54
推荐回答(1个)
回答1:

(1)40%X+60%=5,
     40%X+60%-60%=5-60%,
        40%x÷40%=4.4÷40%,
                x=11;

(2)(1+

5
6
)X=
11
20

         
11
6
x=
11
20

     
11
6
x÷
11
6
=
11
20
÷
11
6

             x=0.3;

(3)5X-3×
7
10
=
7
5

        5x-
21
10
=
7
5

    5x-
21
10
+
21
10
=
7
5
+
21
10

         5x÷5=
35
10
÷5,
             x=0.7;

(4)4:x=
1
2

     
1
2
x=4,
  
1
2
x÷
1
2
=4÷
1
2

        x=8.