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3×4+2×9-{4+[45-5×(8-2m)+23]:4}=14

Răspuns :

3×4+2×9-{4+[45-5×(8-2m)+23]:4}=14
12+18-{4+[45-5×(8-2m)+23]:4}=14
30-{4+[45-5×(8-2m)+23]:4}=14
{4+[45-5×(8-2m)+23]:4}=30-14
4+[45-5×(8-2m)+23]:4=16
[45-5×(8-2m)+23]:4=16-4
[45-5×(8-2m)+23]:4=12
[45-5×(8-2m)+23]=12x4
45-5×(8-2m)+23=48
68-5×(8-2m)=48
5×(8-2m)=68-48
5×(8-2m)=20
8-2m=20:4
8-2m=4
2m=8-4
2m=4
m=4:2
m=2