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12+4x(36:6)-a=72:(4x6:3)p

Răspuns :

Răspuns:

12+4x(36:6)-a=72:(4x6:3)

12+4x6-a=72:(24:3)

12+24-a=72:8

12+24-a=9

36-a=9

a=36-9

a=27