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39x12+[(19x6-14x5 )x8-(21x5-7x13 ) x14} x3=

Răspuns :

Renatemambouko
39x12+[(19x6-14x5 )x8-(21x5-7x13 ) x14} x3=
=468+[(114-70)x8-(105-91 ) x14} x3=
=468+(44x8-14 x14) x3=
=468+(352-196) x3=
=468+156 x3=
=468+468=936

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