2x-3y=6 dan x-y=1 metode subtitusi
Jawab:
(x,y) = {-3,-4}
Penjelasan dengan langkah-langkah:
2x – 3y = 6 (i)
x – y = 1 → x = 1 + y (ii)
subtitusi (ii) ke (i)
2x – 3y = 6
2(1 + y) – 3y = 6
2 + 2y – 3y = 6
-y = 4
y = -4
x – y = 1
x – (-4) = 1
x = -3
Jawaban:
x = -3
y = -4
Penjelasan dengan langkah-langkah:
x-y=1
x = 1+y
•subtitusi x = 1 + y
2x – 3y = 6
2(1+y) – 3y = 6
2 + 2y – 3y = 6
–y = 4
y = –4
•subtitusi y = –4
x–y = 1
x – (–4) = 1
x + 4 = 1
x = –3