Question

4).Nilai y dari SPLDV 2×+3y=11 dan ×-y =3 adalah.... A).y=1 B).y=2 C).y=3 D).y=4

Answer 1

Verified answer

Jawab =
2x+3y = 11
x-y = 3
pakai cara subtitusi menjadi
2x+3y = 11
x = 3+y

2(3+y)+3y = 11
6+2y+3y = 11
6+5y = 11
5y = 11-6
5y = 5
y = 5/5 
y = 1