-2(x - 1/3) - 1/2 = (-3x+1)/3

-2(x - 1/3) - 1/2 = (-3x+1)/3 -2x + 2/3 - 1/2=(-3x + 1)/3   | *3 -6x + 2*3/3 - 1*3/2 = -3x + 1 2 - 3/2 - 1 = -3x + 6x 1 - 3/2 = 3x 2/2 - 3/2 = 3x -1/2 = 3x x = -1/6   Spr   -2(-1/6 - 1/3) - 1/2 = (-3*(-1/6)+1)/3 -2(-3/6) - 1/2 = (3/6 + 1)/3 1 - 1/2 = (9/6)/3 3/2 = 3/2   OK ;)      

-2(x - 1/3) - 1/2 = (-3x+1)/3 -2x + 2/3 - 1/2 = -x + 1/3 -2x + 4/6 - 3/6 = -x + 2/6 -2x +x = 2/6 -4/6 + 3/6 -x = 1/6 x= - 1/6