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a+[(524003-189379):8-39759]=21002

Răspuns :

a+[(524.003-189.379):8-39.759]=21.002
a+[334.624:8-39.759]=21.002
a+(41.828-39.759)=21.002
a+2.069=21.002
a=21.002-2.069
a=18.933