Answer:
x is 50
y is 55
Explanation:
Let us start working with the second patio
At any point in time, the total measure of the angles of a triangle is 180
Thus in the second patio;
x + 20 + 50 + 60 = 180
x + 130 = 180
x = 180-130
x = 50
In the first patio;
x + 10 + y + 15 + 70 = 180
substitute 50 for x
50 + 10 + y + 65 = 180
60 + 65 + y = 180
y = 180-60-65
y = 55