Sofia S

03 November 2024 12:10

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Sofia S

03 November 2024 12:10

Pertanyaan

2x + 2y = 3 3x + 1y = 10

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Jawaban terverifikasi

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Maria H

Level 42

03 November 2024 12:20

Jawaban terverifikasi

<p>Itu yang y=2,75 yah bukan 3</p>

Itu yang y=2,75 yah bukan 3

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Sumber W

Community

Level 72

03 November 2024 15:19

Jawaban terverifikasi

<p>Jawaban yang tepat adalah {(17/4, -11/4)}</p><p>&nbsp;</p><p>Pembahasan :</p><p>2x + 2y = 3 &nbsp; &nbsp; &nbsp; (1)</p><p>3x + 1y = 10 &nbsp; &nbsp; (2)</p><p>&nbsp;</p><p>Eliminasi variabel y</p><p>2x + 2y = 3 &nbsp; &nbsp; &nbsp; (dikali 1) &nbsp;--&gt; 2x + 2y = 3&nbsp;</p><p>3x + 1y = 10 &nbsp; &nbsp; (dikali 2) --&gt;<u> 6x + 2y = 20&nbsp;</u> _</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; -4x &nbsp; &nbsp; &nbsp; &nbsp; = -17</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; x = -17/-4</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; x = 17/4</p><p>Substitusikan x = 17/4 ke persamaan (1)</p><p>2x + 2y = 3</p><p>2(17/4) + 2y = 3</p><p>17/2 + 2y = 3</p><p>2y = 3 - 17/2</p><p>2y = 6/2 - 17/2</p><p>2y = -11/2</p><p>y = -11/2 : 2</p><p>y = -11/2 x 1/2</p><p>y = -11/4</p><p>Jadi himpunan penyelesaiannya adalah {(17/4, -11/4)}</p>

Jawaban yang tepat adalah {(17/4, -11/4)}

 

Pembahasan :

2x + 2y = 3       (1)

3x + 1y = 10     (2)

 

Eliminasi variabel y

2x + 2y = 3       (dikali 1)  --> 2x + 2y = 3 

3x + 1y = 10     (dikali 2) --> 6x + 2y = 20  _

                                                      -4x         = -17

                                                          x = -17/-4

                                                          x = 17/4

Substitusikan x = 17/4 ke persamaan (1)

2x + 2y = 3

2(17/4) + 2y = 3

17/2 + 2y = 3

2y = 3 - 17/2

2y = 6/2 - 17/2

2y = -11/2

y = -11/2 : 2

y = -11/2 x 1/2

y = -11/4

Jadi himpunan penyelesaiannya adalah {(17/4, -11/4)}


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