Answer:
y° = 105°
x = 25
Step-by-step explanation:
y° and 75° are supplementary angles because they make a straight line which means that their sum is equal to 180°
y° + 75° = 180
y° = 105°
The angle represented with 3x° and 75° are alternate angles and their measures are equal.
3x° = 75°
x = 25