gunakan metode eliminasi untuk menentukan jawaban sistem persamaan linear berikut. 5x + 3y = 21 dan 2x + y = 3

<p>Jawaban yang benar adalah &nbsp;{(-12,27)}</p><p>&nbsp;</p><p>&nbsp;</p><p>Pembahasan :</p><p>5x + 3y = 21 &nbsp; &nbsp; &nbsp;(1)</p><p>2x + y = 3 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; (2)</p><p>&nbsp;</p><p>Eliminasi y untuk mendapatkan nilai x</p><p>5x + 3y = 21 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; --&gt; 5x + 3y = 21</p><p>2x + y = 3 &nbsp; &nbsp; &nbsp; &nbsp; (dikali 3) --&gt; <u>6x + 3y = 9 &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;-x &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; = 12</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;x = -12</p><p>Substitusikan x = -12 ke persamaan (2)</p><p>2x + y = 3&nbsp;</p><p>2(-12) + y = 3&nbsp;</p><p>-24 + y = 3</p><p>y = 3 + 24</p><p>y = 27</p><p>&nbsp;</p><p>Himpunan penyelesaian adalah {(-12,27)}</p>