Answer :
Given that BC is perpendicular to CD, angle C is 90 degrees
Hence given that C = 5x + 15
5x + 15 = 90
Collect like terms
5x = 90 - 15
5x = 75
Divide both sides by 5
x = 75/5
= 15
Since A = 3x + 20
A = 3(15) + 20
= 45 + 20
= 65 degrees
Given that BC is perpendicular to CD, angle C is 90 degrees
Hence given that C = 5x + 15
5x + 15 = 90
Collect like terms
5x = 90 - 15
5x = 75
Divide both sides by 5
x = 75/5
= 15
Since A = 3x + 20
A = 3(15) + 20
= 45 + 20
= 65 degrees