Tolong

<p>Karena matrik A dan B ordonya sama maka</p><p>3x + 2y = 10 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; ...(1)</p><p>2x - y = 2 --&gt; y = 2x - 2 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;....(2)</p><p>&nbsp;</p><p>Substitusikan persamaan (2) ke persamaan (1)</p><p>3x + 2y = 10&nbsp;</p><p>3x + 2(2x - 2) = 10&nbsp;</p><p>3x + 4x - 4 = 10&nbsp;</p><p>7x = 10 + 4</p><p>7x = 14</p><p>x = 2</p><p>&nbsp;</p><p>Substitusikan x = 2 ke persamaan (2)</p><p>y = 2(2) - 2 &nbsp;</p><p>&nbsp; &nbsp;= 4 - 2</p><p>&nbsp; &nbsp;= 2</p><p>&nbsp;</p><p>Nilai 2x + &nbsp;y = 2(2) + 2</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; = 4 + 2</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; = 6</p><p>Jadi nilai 2x + y = 6</p>