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Rezolvati ecuatia: 3(-2a+b-3c)-2(-a-3b-c)-(3a-4b-2c)

Răspuns :

3(-2a+b-3c)-2(-a-3b-c)-(3a-4b-2c)=
6a+3b9c+2a+6b+2c3a+4b+2c=
7a+13b5c