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