Question

X + y = -8
2× - y = -1
Menggunakan metode subtitusi .
Tolong bantu yaa

Answer 1

X +y= -8    ==> x = -8 -y

2x -y = -1
2(-8 -y) -y = -1
-16 -2y -y = -1
-16 -3y = -1
-3y = -1 +16
-3y = 15
y = 15/-3
y = -5

x = -8 -y
x = -8 -(-5)
x = -8 +5
x = -3

Jadi, selesaiannya adalah {(-3, -5)}.
Itu jawabannya.