X = 2y + 9 dan x + 5y + 5 = 5 Menggunakan metode subtitusi!​

X + 5y + 5 = 5
x = -5y – 5 + 5
x = -5y

x = 2y + 9
x – 2y = 9
-5y – 2y = 9
-9y = 9
y = 9/-9
y = -1

x = -5y
x = -5(-1)
x = 5