bantuin jawab kak

<p>a. <strong>x = -2 dan y = 3</strong></p><p>5x = -10</p><p>&nbsp; x = ^(-10)/₅ = -2</p><p>3y - 1 = 8</p><p>&nbsp; &nbsp; &nbsp; 3y = 9</p><p>&nbsp; &nbsp; &nbsp; &nbsp;y = ⁹/₃ = 3</p><p>&nbsp;</p><p>b. <strong>x = 1 dan y = -2</strong></p><p>2x + 3y = -4 |2×| &nbsp;4x + 6y = -8</p><p>&nbsp;5x - 2y = 9 &nbsp;|3×| <u>15x - 6y = 27</u> &nbsp;+</p><p>ㅤㅤㅤㅤㅤㅤㅤ &nbsp; 19x + 0 = 19</p><p>19x = 19</p><p>&nbsp; &nbsp;x = ¹⁹/₁₉ = 1</p><p>&nbsp;</p><p>&nbsp; &nbsp;2x + 3y = -4</p><p>2(1) + 3y = -4</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;3y = -4 - 2</p><p>3y = -6</p><p>&nbsp; y = ^-6/₃ = -2</p><p>&nbsp;</p><p>c. <strong>x = -4 dan y = -3</strong></p><p>4x = -16</p><p>&nbsp; x = ^(-16)/₄ = -4</p><p>3y = -9</p><p>&nbsp; y = ^(-9)/₃ = -3</p><p>&nbsp;</p><p>d. <strong>x = 6 dan y = 6</strong></p><p>&nbsp; &nbsp;2x - 1 = y + 5 &nbsp; &nbsp;... (1)</p><p>&nbsp; &nbsp;3x - y = 6 + x &nbsp; &nbsp; ...(2)</p><p>2x + 3y = 3x + 2... (3)&nbsp;</p><p>Selesaikan persamaan (1) untuk mencari nilai y :</p><p>2x - 1 = y + 5</p><p>2x - 1 - 5 = y</p><p>&nbsp; &nbsp; &nbsp;2x - 6 = y ... (4)</p><p>Subtitusi persaman (4) &nbsp;ke persamaan (2) untuk mencari nilai x :</p><p>3x - y = 6 + x</p><p>3x - (2x - 6) = 6 + (2x - 6)</p><p>&nbsp; 3x - 2x + 6 = 6 + 2x - 6</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;x - 2x = 0 - 6</p><p>-x = -6</p><p>&nbsp; x = ^(-6)/_(-1) = 6</p><p>Subtitusi x = 6 ke persamaan (4) untuk mencari nilai y :</p><p>y = 2x - 6</p><p>y = 2(6) - 6</p><p>y = 12 - 6</p><p>y = 6</p><p>*Untuk persamaan ke (3) kemungkinan adalah 2x + 3y = 3x + 2y. Tapi saya menggunakan persamaan (1) dan (2) untuk acuan :) 🙏</p><p>&nbsp;</p><p>Terimakasih, semoga membantu :&gt;</p>