Question

Tentukan HP dari SPLDV berikut dengan cara substitusi
2x+3y=1 Dan x-y= -2​​

Answer 1

Jawaban:

2x + 3y = 1

x - y= -2

x = -2 + y

2x + 3y = 1

2( -2 + y) + 3y = 1

-4 + 2y + 3y = 1

2y + 3y = 1 + 4

5y = 5

y = 5 : 5

y = 1

x - y= -2

x - 1 = -2

x = -2 + 1

x = -1

HP = { -1, 1}

Uji

2x + 3y = 1

2(-1) + 3(1) = 1

-2 + 3 = 1 ( terbukti)

x-y= -2

-1 - 1 = -2 ( terbukti)