Disebuah toko menjual paket alat tulis. Paket A berisi 5 buku tulis dan 2pensil seharga Rp.18.000,- dan paket B berisi sebuah buku tulis dan 2pensil seharga Rp.10.000,- Berapakah harga 1buku tulis dan 1 pensil?

<p>Buku tulis (x) dan Pensil (y)&nbsp;</p><p>Paket A &gt; 5x+2y=18</p><p>Paket B &gt; &nbsp; x+2y=10</p><p>Cara Eliminasi :&nbsp;</p><p>5x+2y=18 | ×1 | 5x+2y=18</p><p>&nbsp; x+2y=10 | ×5 | 5x+10y=50</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; &nbsp; &nbsp; &nbsp;-8y=-32</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; y= 4</p><p>x+2y=10</p><p>x+2(4)=10</p><p>&nbsp; &nbsp; &nbsp; &nbsp;x = 2</p><p>Jadi, harga buku = 2.000&nbsp;</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;harga pensil = 4.000</p><p>&nbsp; &nbsp; &nbsp;&nbsp;</p><p>&nbsp;</p><p>&nbsp;</p>