himpunan penyelesaian dari sistem persamaan linear 4x+y=-5 x+2y=4

MAPEL = MATEMATIKA
KELAS = 8
BAB = SPLDV

eliminasi nilai y
4x + y = -5 |×2
x + 2y = 4 |×1

8x + 2y = -10
x + 2y = 4
___________-
7x = -14
x = -14/7
x = -2

subtitusi nilai x
x + 2y = 4
-2 + 2y = 4
2y = 4 + 2
2y = 6
y = 6/2
y = 3

Hp = { -2,3 }

semoga membantu

dengan cara subsitusi
eliminasi x
4x+ y=-5 |×1 | 4×+y=-5
x+2y= 4 |×4 | 4×+8y=20 -
----------------
-8y= 15
y= 15/8
y= 1,
eliminasi y
4x+ y=-5 |×2 | 8x+2y=-10
x+2y= 4 |×1 | x+2y=4 -
----------------
8× = -6
x= -6/8
x=