Answer:
no, the answer is 10 because they are supplementary lines which equal to 180. So basically 10 takes the place of X when your doing the equation. (shown below) vvvv
Step-by-step explanation:
DE= 8x + 20
EC= 3x + 50
DE= 8(10) +20=100
EC= 3(10) + 50=80
100+80=180
X=10
