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3(2x + 1) - 10 = 2(x-3) + 11

Răspuns :

3(2x+1)-10=2(x-3)+11⇒
6x+3-10=2x-6+11⇒6x-2x=7+11-6⇒4x=12⇒x=12/4⇒x=3
sucees