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buna seara doar ex j ofer coroana..​va rog detaliat

Buna Seara Doar Ex J Ofer Coroanava Rog Detaliat class=

Răspuns :

Răspuns:

j) 90+{2×[20-5×(7-6)×a]}=100

90+{2×[20-5×1×a]}=100

90+[2×(20-5a)]=100

90+(40-10a)=100

40-10a=100-90

40-10a=10

-10a=10-40

-10a=-30

=>a=-30/-10

=>a=3