Metode Subsitusi X - 3y =1 2x - y =7

ubah dlu X-3Y=1 => X=3Y+1

subtitusikn pers 1 ke pers 2
2 (3y+1)-y=7
6y+2-2y=7
4y+2=7
4y=7-2
=5
y=5/4
subttusikn y=5/4 ke pers 1
×=3 (5/4)+1
15/4+1
15/4+4/4
19/4
y=5/4 dan x=19/4

x - 3y = 1 => x = 1 + 3y (1)
2x - y = 7 (2)

Persamaan 1&2

<=> 2x -y = 7
<=> 2(1+3y) - y = 7
<=> 2+6y -y = 7
<=> 6y - y = 7-2
<=> 5y = 5
<=> y = 1 (3)

Persamaan 3&1

<=> x = 1 + 3y
<=> x = 1 + 3(1)
<=> x = 1 + 3
<=> x = 4

hp:{4,1}

Semoga membantu ,kalau ada yang tidak bisa boleh di tanyakan