Answer:x = 78y =64z=102Step-by-step explanation:The three angles of a triangle add to 180 degrees59+43+x = 180102 +x = 180Subtract 102 from each side102-102+x = 180-102x = 78X and z form a straight line so they add to 180x+z = 18078+z =180Subtract 78 from each side78-78+z = 180-78z = 102The three angles of a triangle add to 18014+z+y = 18014+102+y =180Combine like terms116+y = 180Subtract 116 from each side116-116 +y = 180 -116y = 64