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[5000-(23*a-14)*9:100=14 VA ROGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGG

Răspuns :

[5.000-(23xa-14)x9]:100=14
[5.000-(23xa-14)x9]=14x100
5.000-(23xa-14)x9=1.400
(23xa-14)x9=5.000-1.400
(23xa-14)x9=3.600
23xa-14=3.600:9
23xa-14=400
23xa=400+14
23xa=414
a=414:23
a=18