Question

TOLONG DIJAWAB DALAM WAKTU 30 MENIT INII PENTING BANGETT, TOLONG JANGAN NGARANG YA, MENGGUNAKAN METODE ELIMINASI ​

Answer 1

1.

x - 3y = 4

x + 3y = 10

_________ -

-6y = -6

y = -6/-6

y = 1

x + 3y = 10

x + 3(1) = 10

x = 10-3

x = 7

x=7 dan y=1

2.

Samakan angka di depan variabel x dulu

2x + 5y = -8 ×4

4x + 3y = 12 ×2

8x + 20y = -32

8x + 6y = 24

___________-

14y = -56

y = -56/14

y = -4

2x + 5y = -8

2x + 5(-4) = -8

2x + (-20) = -8

2x = -8 + 20

2x = 12

x = 12/2

x = 6

x=6 dan y=-4

3.

Samakan angka di depan variabel x dulu

2x - 3y = 7 ×3

3x + 2y = 4 ×2

6x - 9y = 21

6x + 4y = 8

_________-

-13y = 13

y = 13/-13

y = -1

2x - 3y = 7

2x - 3(-1) = 7

2x - (-3) = 7

2x + 3 = 7

2x = 7 - 3

2x = 4

x = 4/2

x = 2

x=2 dan y-1

4.

• 2x + y = -9

• x = 3y - 1

x - 3y = - 1 (pindah ruas variabel y)

Samakan angka di depan variabel x

2x + y = -9 ×1

x - 3y = -1 ×2

2x + y = -9

2x - 6y = -2

_________-

7y = -7

y = -7/7

y = -1

x = 3y - 1

x = 3(-1) - 1

x = -3 - 1

x = -4

x=-4 dan y=-1