himpunan penyelesaian sistem persamaan 4x + 7y = 5 dan x + y=-1 adalah

SPLDV

4x + 7y = 5 ... ×1
x + y = -1 ........ ×4

Eliminasi
4x + 7y = 5
4x + 4y = -4
__________ _
3y = 9
y = 9/3
y = 3

Substitusi
x + y = -1
x + 3 = -1
x = -1 - 3
x = -4

HP = {-4, 3}