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

Question

I am not sure how to do this

Answer 1

expand first , then collect like terms

x - 9x + 10 + 11 = 12 - 6x + 1
-8x + 6x = 13 - 21
-2x = -8
x = 4