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Cum calculez:2x+3=3•(x+1)-x??
Va rog repede!Ma grabesc!


Răspuns :

2x+3=3x+3-x
2x+3=2x+3
2x=2x=> egalitatea e adevarata.
2x+3=3x+3-x
2x+3=2x+3 (A)
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