Dengan metode subtitusi 4x - 2y = 4 -3x + 6y = 15 Tolong bantu ya...

SPLDV

4x - 2y = 4
2y = 4x - 4 ... (1)

subtitusi kan (1) ke -3x + 6y = 15

-3x + 6y = 15
-3x + 3 . 2y = 15
-3x + 3(4x - 4) = 15
-3x + 12x - 12 = 15
9x = 15 + 12
x = 27/9
x = 3

2y = 4x - 4
2y = 4.3 - 4
2y = 12 - 4
y = 8/2
y = 4

(x,y) = (3,4)

jawab

4x - 2y = 4 atau 2x - y = 2
y = 2x - 2  
sub ke -3x +6y = 15
-3x +6(2x -2)  = 15
-3x +12x -12 = 15
9x = 27
x = 3
y = 2x - 2
y = 6-2
y = 4
HP(x,y)= (3,4)