Реши уравнение : 1 ) 2x - ( 6x + 1 ) = 9
2x - ( 6x + 1 ) = 9 2x - 6x - 1 = 9 -4x = 9 +1 -4x = 10 -x = 10:4 -x = 2 2/4 = 2 1/2 x = -2 1/2
2x - ( 6x + 1 ) = 92x-6x-1=9 -4x=9+1 -4x=10 x=10/(-4)=-2.5