spltv dari : 2x+3y+3z=4 2x-6y+9z=5 4x+3z=4 adalah...

2x + 3y + 3z = 4 |x2|
2x - 6y + 9z = 5 |x1|

4x + 6y + 6z = 8
2x - 6y + 9z = 5
____________ +
6x + 15 z = 13 (1)
eliminasi hasil tadi

6x + 15z = 13 |x1|
4x + 3z = 4 |x5|

6x + 15z = 13
20x + 15z = 20
___________ -
-14x = -7
x = ½
z = ⅔

2x + 3y + 3z = 4
2 (½) + 3y + 3(⅔) = 4
1 + 2 + 3y = 4
y = ⅓