himpunan penyelesaian sistem persamaan linier

Kelas 8 Matematika
Bab SPLDV

-8x + y = -140
y = 8x - 140

3x + 2y = 24
3x + 2 (8x - 140) = 24
3x + 16x - 280 = 24
19x = 24 + 280
x = 304/19
x = 16

y = 8x - 140
y = 8 . 16 - 140
y = 128 - 140
y = -12

HP = { (16, -12) }

3x + 2y = 24 | ×1 |
-8x + y = -140 | ×2 |
----------------------------
3x + 2y = 24
-16x + 2y = -280
------------------------ -
19x = 304
x = 16

3x + 2y = 24
3 (16) + 2y = 24
48 + 2y = 24
2y = -24
y = -12

HP = {(16,-12)}