3×4+2×9{4+[45-5×(8-2×x)+23]\4}=14




Răspuns :

3×4+2×9-{4+[45-5×(8-2×x)+23]:4}=14

12 + 18 -{4+[45-5×(8-2×x)+23] : 4} = 14

4+[45-5×(8-2×x)+23] : 4 = 30 - 14

4+[45-5×(8-2×x)+23] : 4 = 16

[45-5×(8-2×x)+23] : 4 = 16 - 4

[45-5×(8-2×x)+23] :4 = 12

45-5×(8-2×x)+23 = 12×4

45-5×(8-2×x) + 23 = 48

45 -5×(8-2×x) = 48-23

45-5×(8-2×x) = 25

5×(8-2×x) = 45-25

5×(8-2×x) = 20

8-2×x = 20:5

8-2×x = 4

2×x = 8-4

2×x = 4

x = 4 : 2

x = 2