ANSWER
y=10
x=5
EXPLANATION
The base angles of an isosceles triangle are equal.
This implies that:
8y-7=73°
Add 7 to both sides:
8y=73+7
8y=80°
y=10°
Interior angles of a triangle sums up to 180°
73+73+6x+4=180
150+6x=180
6x=180-150
6x=30
Divide both sides by 6
x=5
