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5a-3(b+c)+145:5-8=?;3a-2b=b-2a+3c



Răspuns :

3a-2b=b-2a+3c <=> 5a-3b-3c=0 (treci termenii din dreapta in stanga)
5a-3(b+c)+145:5-8= 5a-3b-3c+29-8=0+21=21