6x+7y=13 dan 5x+y=-1 metode eliminasi

Bab Persamaan Linear
Matematika SMP Kelas VIII

5x + y = -1 → dikali 7 → 35x + 7y = -7

35x + 7y = -7
...6x + 7y = 13
-------------------- -
29y = -20
y = -20/29

6x + 7y = 13 → dikali 5 → 30x + 35y = 65
5x + y = -1 → dikali 6 → 30x + 6y = -6

30x + 35y = 65
30x + 6y = -6
------------------------ -
29 y = 71
y = 71/29

HP = { -20/29, 71/29 }