X + y = 25
X - 15 = y
X + (x - 15) = 25
2x - 15 = 25
2x= 10
X=5
5 + y = 25
Y=20
20+5 because 5 is 15 less than 25.
Answer:
∠ CED = 58°
Step-by-step explanation:
∠ CED and ∠ AED are adjacent angles and sum to 180° , then
∠ CED + 122° = 180° ( subtract 122° from both sides )
x+129=592
add 129 to each side
