What simplifications, if any, can be made to solve for the equilibrium concentrations of each chemical? a. The x's in the 1st and 2nd columns of the E line can be assigned a value of zero. b. All the x's in the C line can be assigned a value of zero. c. All the x's in the E line can be assigned a value of zero. d. The x in the 2nd columns of the E line can be assigned a value of zero. e. No simplifications can be made.