himpunan penyelesaian dari persamaan linear 2x-3y=13 x+2y=-4 adalah?

Kelas 8 Matematika
Bab Persamaan Linear

x + 2y = -4
x = -2y - 4

2x - 3y = 13
2 (-2y - 4) - 3y = 13
-4y - 8 - 3y = 13
-7y = 13 + 8
y = 21/-7
y = -3

x = -2y - 4
x = -2 . (-3) - 4
x = 6 - 4
x = 2

HP = { (2, -3) }

x + 2y = -4
x = -4 - 2y ....(1)

2x - 3y = 13 ....(2)

subtitusi
2x - 3y = 13
2(-4 - 2y) - 3y = 13
-8 - 4y - 3y = 13
-4y - 3y = 13 + 8
-7y = 21
y = 21/-7
y = -3

x = -4 - 2y
= -4 - 2(-3)
= -4 - (-6)
= 2

hp = {2,-3}