-------------------------------------------------- Solve for x and y : -------------------------------------------------- x + y = 180 -------- (1) x = 5y - 18 --------- (2)
Sub (2) into (1) : 5y - 18 + y = 180 6x = 198 x = 33 --------- Sub into (1) x + y = 180 33 + y = 180 y = 147
----------------------------------------------------- Answer: x = 33°, y = 147° -----------------------------------------------------