3x + 2y = 8 2x + 3y = 12 selesaikan dgn metode subtitusi *dgn cara

3x+2y=8
2y = -3x+8
y= -3x+8 per 2
y = -3/2x +4

substitusikan ke pers 2
2x +3y= 12
2x +3(-3/2x +4)= 12
2x -9/2 x +4 = 12
2x - 9/2x= 12-4
2x - 9/2x = 8
2(2x-9/2x) = 2(8)
4x - 9x = 16
-5x = 16
x = 16/-5
x = -3 1/5
maka
y = -3/2(16/-5) +4
y = -48/-10 +4
y= 4,8 + 4
y= 8,8 = 4 8/10 = 4 4/5

maka penyelesaiannya (-3 1/5, 4 4/5)

maaf jika salah