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Calculati,respectand regulile invatate:3x[90:45+2x(69:13+10)]+105:3=            (este de clasa a v a).Va rog mult.


Răspuns :

3x[90:45+2x(69:13+10)]+105:3=3x(90:45+2x5,307)+105:3=
3x(90:45+10,614)+105:3=
3x2+10,614+105:3=
6+10,614+35=51,614