Jawabanmu

2014-01-24T14:55:03+07:00
2x - 3y=12 (x3) --> 6x - 9y = 36
3x + 4y=1
  (x2) --> 6x + 8y = 2

-17y = 34
y = -2

2x - 3y = 12
2x - 3(-2) = 12
2x + 6 = 12
2x = 6
x = 3