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②. Rezolvați ecuațiile: a) 3·(4x-1)= 21; d)-3-(4x-6)= 30; g) 5.(3x-4)= 6x + 7; j) 12.(x − 1) = 48; b) 3.(5x+2)= 36; e)-5-(2x-3)=8x-3; h) -4(x-3)= 16; k) 4 (6x-1)= 20x; c) 6.(2x-1)=-18; f) 3.(2x-5)= 21; i) 2.(7x+2)= 18; 1) 14.(x + 1) = 13x.​