tuliskan himpunan penyelesaian spldv dengan metodde subsititusi

Materi : SPLDV
Kelas : IX SMP

y= 2x -3 ... pers.1
3x - 4y = 7.... pers.2

subs nilai y ke pers.2
3x - 4(2x-3) = 7
3x - 8x + 12 = 7
-5x = -5
x = 1
sub nilai x ke pers.1
y = 2(1) - 3 = -1

Hp = (1,-1)

2x + 3y = 19..... pers.1
x - y = 2 => x = y+2...pers.2

subs nilai x pers.2 ke pers.1

2(y+2) + 3y = 19
2y + 4 + 3y = 19
5y = 15
y = 3
subs nilai y ke pers. 2
x = 3 + 2 = 5

Hp = (x,y) = (5,3)