Answer:
Step-by-step explanation:
12x - 3 = 180 - (7x - 26) supplementary angles
19x = 209
x = 11
m∠DEC = 12(11) - 3 = 129°
m∠BCE = 7(11) - 26 = 51°
M∠ADE = 129 - 72 = 57° exterior angle rule
m∠EDB = 180 - 57 = 123° supplementary angles
m∠DBC = 57° corresponding angle to ADE
x = 10
y = 20
7x + 90 + 20 = 180
7x = 70
5x + 2y = 90
50 + 2y = 90
2y = 40
143º I’m not sure
x=25
60+70=130
180-130=50
50/2=25
