Answer:
D 60
Explanation:
Fist we can determine y
7y+5y = 180 since it is a straight line
12y = 180
Divide each side by 12
12y/12 =180/12
y = 15
We also know that 5y+3y +x = 180 since the angles of a triangle add to 180
8y +x = 180
8*15 +x = 180
120+x = 180
Subtract 120 from each side
120-120+x = 180-120
x = 60