Tuliskan himpunan penyelesaian spldv dengan metodde subsititusi
Jawaban Terkonfirmasi
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)