Amelia S

16 September 2025 14:13

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Amelia S

16 September 2025 14:13

Pertanyaan

Jika x dan y adalah penyelesaian dari sistem persamaan 7x+2y=19 dan 4x-3y=15

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Azka N

16 September 2025 14:59

<p>Eliminasi y</p><p>7x+2y=19 |X3| 21x+6y= 57</p><p>4x-3y=15 &nbsp;|x2| &nbsp;<u>8x-6y=30&nbsp;</u> &nbsp;+</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;29x+0=87</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;29x=87</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;x=87/29</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;x= 3</p><p>Subtitusikan x = 3 ke pers 2</p><p>4x-3y=15</p><p>4(3)-3y=15</p><p>12-3y=15</p><p>-3y = 15-12</p><p>-3y = 3</p><p>y = 3/-3</p><p>y = -1</p><p>Himpunan penyelesaiannya {3,-1}</p><p>(Pakai cara campuran)</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;</p>

Eliminasi y

7x+2y=19 |X3| 21x+6y= 57

4x-3y=15  |x2|  8x-6y=30   +

                           29x+0=87

                                 29x=87

                                     x=87/29

                                     x= 3

Subtitusikan x = 3 ke pers 2

4x-3y=15

4(3)-3y=15

12-3y=15

-3y = 15-12

-3y = 3

y = 3/-3

y = -1

Himpunan penyelesaiannya {3,-1}

(Pakai cara campuran)

             


Azka N

16 September 2025 15:00

kalo ada yang kurang jelas bisa ditanyaπŸ™

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Leticia L

17 September 2025 07:15

<p>1. 7Γ— + 2y = 19</p><p>2. 4Γ— - 3y = 15</p><p>Dari (1) β†’y = 19 - 7Γ— / 2</p><p>Substitusi ke (2)</p><p>4Γ— -3 19 - 7Γ—/2 = 15β†’Γ— = 3</p><p>Lalu y = 19 - 21 / 2 = -1</p><p>Jawabannya adalah&nbsp;</p><p>Γ— = 3, y = -1</p><p>&nbsp;</p>

1. 7Γ— + 2y = 19

2. 4Γ— - 3y = 15

Dari (1) β†’y = 19 - 7Γ— / 2

Substitusi ke (2)

4Γ— -3 19 - 7Γ—/2 = 15β†’Γ— = 3

Lalu y = 19 - 21 / 2 = -1

Jawabannya adalah 

Γ— = 3, y = -1

 


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