tentukan himlunanan penyelesaian dar x + 4y = 0 dan 2x + y = 7?

eliminasi x
x + 4y = 0 |×2
2x + y = 7 |×1
2x + 8y = 0
2x + y = 7
________-
7y = -7
y = -1
masukan nilai y = -1 ke persamaan 1
x + 4y = 0
x + 4(-1) = 0
x = 4
HP = (4, -1)