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[200-(64+x.12+2.11)].(50-24.2+13.5-9.5)=1980

Răspuns :

[200-86+12x)].22=1980
(200-86-12x).22=1980
(114-12x).22=1980
2508-264x=1980
-264x=1980-2508
-264x=-528
x=2