penyelesaian 2/3x + 1/2y + 1 = 0 dan 2/9x - 2/3y +2 = 0 . jika x=p dan y=q. nilay dari 2p-q adalah? sama caranya..

⅔x + ½y + 1 = 0 ...( I )
2/9x - ⅔y + 2 = 0 ...( II )

6 . ⅔x + 6 . ½y + 6 . 1 = 6 . 0
9 . 2/9x - 9 . ⅔y + 9 . 2 = 9 . 0

2 . 2x + 3y + 6 = 0
2x - 3 . 2y + 18 = 0

4x + 3y + 6 = 0
2x - 6y + 18 = 0

4x + 3y = -6
2x - 6y = -18

4x + 3y = -6
x - 3y = -9

5x = -15
x = -3

4 (-3) + 3y = -6
-12 + 3y = -6
3y = -6 + 12
3y = 6
y = 6/3
y = 2
= (x,y) = (-3,2)

x = p
y = q

2p - q
= 2 (-3) - 2
= -6 - 2
= -8

#Maaf yh kalo salah...