Answer:
x = 75
y = 15
Explanation:
What you need to know to solve this question:
1. Angles in a triangle sum up to 180
2. Angles on a straight line add up to 180
3. A right-angle is 90
4. The triangle illustrated is a right-angle triangle
Solving for x:
According to principle 2:
x + 105 = 180
x = 180 - 105
x = 75
Solving for y:
According to principles 1 and 3:
x + y + 90 = 180
(75) + y + 90 = 180
y = 180 - 90 - 75
y = 15