Question

Diketahui sistem persamaan 3x + 7y = 1 2x – 3y = 16 Nilai xy =.... A. 8 B. 6 C. -10 D. -12​

Answer 1

Jawab:

- 10

Penjelasan dengan langkah-langkah:

3x + 7y  = 1

2x - 3y  = 16

6x + 14y = 2

6x - 9y = 48

___________-

23y = - 46

y= - 2

3x + 7y = 1

3x - 14 = 1

3x = 15

x = 5

xy

5 . (-2 )

- 10