解方程. 58x=40 x-x÷113=45 24-120%x=18

解方程. 58x=40 x-x÷113=45 24-120%x=18.
2024-11-29 02:49:45
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回答(1):

(1)

5
8
x=40,
     
5
8
8
5
=40×
8
5

           x=64;

(2)x-x÷1
1
3
=
4
5

       x-x×
3
4
=
4
5

           
1
4
x=
4
5

       
1
4
x×4=
4
5
×4,
             x=3
1
5


(3)24-120%x=18,
 24+1.2x-1.2x=18+1.2x,
      18+1.2x=24,
   18-18+1.2x=24-18,
    1.2x÷1.2=6÷1.2,
            x=5.