Answer:
Step-by-step explanation:
∠DEC + ∠EDC + ∠ECD = 180 {angle sum property of triangle}
45 + 65 + ∠ECD = 180
110 +∠ECD = 180
∠ECD = 180 - 110
∠ECD = 70°
AB // CD and AE transversal
∠BAC = ∠ECD {Corresponding angles are equal}
∠BAC = 70°
70
65 and 45 make up 110, and triangles are composed up 180°. The missing angle thatll make it add up to 180 is 70
y -3x =1
add 3x to each side
y = 3x+1
The coefficient for x is 3 and the constant is 1
