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numitor comun 12 si ecuatia devine ;
4(x-1)+6(x+1) = 2(4x-3)+3 ;
4x-4+6x+6 = 8x-6+3 ;
10x+2 = 8x-3 ;
10x-8x = -3-2 ;
2x = -5 ;
x = -5:2 = -2,5 ;