Tentang metode substitusi Soal: X-4y=8danX+2y=2 Edit: jawab nya pakai cara!

X-4y=8
x = 4y + 8

Lalu dimasukkan ke persamaan
X+2y=2
(4y + 8) + 2y = 2
6y + 8 = 2
6y = 2-8
6y = -6
y = -6 : 6
y = -1

lalu x nya dimasukkan
x = 4y + 8
x = 4 (-1) + 8
x = -4 + 8
x = 4

Finish

x - 4y = 8
x = 8 + 4y

x + 2y = 2
8 + 4y + 2y = 2
6y = 2 - 8
6y = -6
y = -1

x = 8 + 4y
x = 8 + 4(-1)
x = 8 - 4
x = 4