tolong kak

<p><strong>Jawaban yang tepat adalah</strong></p><p><strong>1. x = 1, y = -1, z = 2</strong></p><p><strong>2. x = 2, y = 3, z = 1</strong></p><p>&nbsp;</p><p><strong>Pembahasan:</strong></p><p>1. Ada pada gambar, ya! (Metode Campuran)</p><p>2.&nbsp;</p><p><strong>x - y + z = 0</strong></p><p><strong>4x - z = 7</strong></p><p><strong>2y - z = 5</strong></p><p>&nbsp;</p><p><strong>• Metode Eliminasi&nbsp;</strong></p><p>x - y + z = 0</p><p>4x &nbsp; &nbsp; - z = 7</p><p>——————— +</p><p><strong>5x - y &nbsp; &nbsp;= 7</strong></p><p>&nbsp;</p><p>4x &nbsp; &nbsp; &nbsp; &nbsp;- z = 7</p><p>&nbsp; &nbsp; &nbsp; 2y &nbsp;- z &nbsp;= 5</p><p>———————— ¯</p><p><strong>4x - 2y &nbsp; &nbsp; &nbsp;= 2</strong></p><p>&nbsp;</p><p>5x - y = 7 &nbsp; &nbsp;|x2| &nbsp;10x - 2y = 14</p><p>4x - 2y = 2 &nbsp;|x1| &nbsp; 4x &nbsp;- 2y &nbsp;= 2</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; ———————— ¯</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 6x &nbsp; &nbsp; &nbsp; &nbsp; = 12</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;x &nbsp; &nbsp; &nbsp; &nbsp;= 12/6</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp;<strong> &nbsp; x &nbsp; &nbsp; &nbsp; &nbsp;= 2</strong></p><p>&nbsp;</p><p><strong>• Metode Substitusi</strong></p><p>5x - y = 7</p><p>5(2) - y = 7</p><p>10 - y = 7</p><p>-y = 7 -10</p><p>-y = -3</p><p><strong>y = 3</strong></p><p>&nbsp;</p><p>2y - z = 5</p><p>2(3) - z = 5</p><p>6 - z = 5</p><p>-z = 5 - 6</p><p>-z = - 1</p><p><strong>z = 1</strong></p><p>&nbsp;</p><p><strong>Jadi, x = 2, y = 3, z = 1</strong></p><p>&nbsp;</p><p>Semoga membantu dan semangat belajar!</p>