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x + 2y = 4 | dikali 2 |
menjadi:
2x - 4y = - 16
2x + 2y = 4
____________-
-8y = -24
y = -24:-8
y = 3
x + 2 . y = 4
x + 2 . 3 = 4
x + 6 = 4
x = 4 - 6
x = -2
Jadi . y =3 dan x =-2
x+2y = 4 (x2) 2x +4y = 8 +
-------------------------
4x = -8 -----> x = -8/4 = -2
x+2y = 4
-2+2y = 4
2y = 4+2 = 6
y = 6/2
y = 3