Which two equations can be used to determine the measure of these two adjacent angles, (2x+3) and (X-6)

A. 2X +3 equals X -6.
B. 3X -3 equals 180.
C. (2X +3) minus (X -6) equals 180.
D.(X+6) - (2x+3) = 180
E. (2x+3)+(x-6)=180

A. 2X +3 equals X -6.

C. (2X +3) minus (X -6) equals 180.