3a+2b=1 2a-4b=-10 hasil dari spldv dari angka tersebut adalah

<p>Jawaban yang tepat adalah &nbsp;{(-1,2)}</p><p>&nbsp;</p><p>Pembahasan :</p><p>3a + 2b = 1 &nbsp; &nbsp; &nbsp;(1)</p><p>2a - 4b = -10 &nbsp; (2)</p><p>Eliminasi variable b untuk mendapatkan nilai a</p><p>3a + 2b = 1 &nbsp; &nbsp; &nbsp;(kali 2) --&gt; 6a + 4b = 2</p><p>2a - 4b = -10 &nbsp; (kali 1) --&gt; <u>2a - 4b = -10&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; 8a &nbsp; &nbsp; &nbsp; &nbsp; = -8</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; a = -8/8 = -1</p><p>Substitusikan a = -1 ke persamaan (1)</p><p>3a + 2b = 1</p><p>3(-1) + 2b = 1</p><p>-3 + 2b = 1</p><p>2b = 1 + 3</p><p>2b = 4</p><p>b = 4/2</p><p>b = 2</p><p>&nbsp;</p><p>nilai a = -1 dan b = 2</p><p>Jadi himpunan penyelesaiannya adalah {(-1,2)}</p><p>&nbsp;</p>