Three angles have measures that add up to 180 they have the following angle measures M ABC equals(x-6) mcbd =(4x-14) and mdbe =5x what is the equation to solve for X

9x-20=180
10x-20=180
10x+20.=180
X-20=180

The correct equation to solve for x would be:

(x-6) + (4x-14) + 5x = 180