Explicație pas cu pas:
3x4 +2x9-{4+[45-5•(8-2•x)+23]:4}=14
12+18-{4+[45-5x(8-2xx)+23]:4=14
30-{4+[45-5x(8-2xx)+23]:4=14
{4+[45-5x(8-2xx)+23]:4=30-14
4+[45-5x(8-2xx)+23]:4=16
[45-5x(8-2xx)+23]:4=16-4
[45-5x(8-2xx)+23]:4=12
[45-5x(8-2xx)+23]=12x4
45-5x(8-2xx)+23=48
68-5x(8-2xx)=48
5x(8-2xx)=68-48
5x(8-2xx)=20
(8-2xx)=20:5
8-2x x=4
2xx=8-4
2xx=4
x=4:2
x=2
