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Calculati : 5a - 3(b+c) + 145 : 5 - 8 daca 3a - 2b = b - 2a + 3c

Răspuns :

3a - 2b = b - 2a + 3c
5a=3b+3c
5a=3(b+3)

5a - 3(b+c) + 145 : 5 - 8=0+29-8=21