x-(9x-10)+11=12x+3(-2+(1/3))

x-(9x-10)+11=12x+3(-2+(1/3))

simplify

x - 9x + 10 + 11 = 12x + 3 (-5/3)

-8x + 21 = 12x - 5         add 8x to both sides and add 5 to both sides

26 = 20x                       divide both sides by 20

26/20 = 13/10 = x