4÷5x=202x-6=12x-5÷6=71÷2x-8=4

4÷5x=202x-6=12x-5÷6=71÷2x-8=4.
2025-06-26 13:03:54
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回答1:

(1)4÷5x=20
     4÷5x×5x=20×5x
             4=100x
     100x÷100=4÷100
             x=0.04;

(2)2x-6=12
   2x-6+6=12+6
       2x=18
    2x÷2=18÷2
        x=9;

(3)x-5÷6=7
       x-

5
6
=7
    x-
5
6
+
5
6
=7+
5
6

         x=7
5
6


(4)1÷2x-8=4
   1÷2x-8+8=4+8
       1÷2x=12
   1÷2x×2x=12×2x
           1=24x
     24x÷24=1÷24
           x=
1
24