Answer:
y = 108°
Explanation:
3x - 12 and 2x + 16 are corresponding angles and are congruent , then
3x - 12 = 2x + 16 ( subtract 2x from both sides )
x - 12 = 16 ( add 12 to both sides )
x = 28
then
3x - 12 = 3(28) - 12 = 84 - 12 = 72°
y and 3x - 12 are adjacent angles and sum to 180° , that is
y + 72° = 180° ( subtract 72° from both sides )
y = 108°