Question

Sistem Persamaan Linear Dua Variabel

menggunakan metode eliminasi ​

Answer 1

Jawaban:

1. X = -3 dan Y = -2

2. X = -6,4 dan Y = -0,53

3. X = 2 dan Y = 5

Penjelasan dengan langkah-langkah:

1. x - y = -1 (×3) 3x - 3y = -3

3x + 2y = -13

= 3x - 3y = -3

3x + 2y = -13

———————— -

= -5y = 10

y = 10/-5

y = -2

x - y = -1

x - (-2) = -1

x + 2 = -1

x = -2 - 1

x = -3

2. x - 3y = 8

3x - y = -8 (×3) 6x - 3y = -24

= x - 3y = 8

6x - 3y = -24

———————— -

= -5x = 32

x = 32/-5

x = -6,4

x - 3y = 8

(6,4) - 3y = 8

-3y = 8 - 6,4

-3y = 1,6

y = 1,6/-3

y = -0,53

3. 2x + y = 9 (×2)

x + 2y = 3

= 4x + 2y = 18

x + 2y = 3

———————— -

= 3y = 15

y = 15/3

y = 5

2x + y = 9

2x + (5) = 9

2x = 4

x = 4/2

x = 2

semoga membantu