Pada toko buku “Sahabat” terdapat paket belajar dan paket membaca. Paket belajar berisi 8 buku dan 4 pulpen, sedangkan paket membaca berisi 5 buku. Pak Joko membeli 2 paket belajar dengan harga Rp.72.000 dan pak cipto membeli 2 paket membaca dan 1 paket belajar. Seharga Rp.71.000 a. Berapakah harga sebuah buku dan sebuah pulpen b. Berapakah harga paket belajar dan membaca c. Jika kamu membeli 5 paket belajar dan 3 paket membaca berapakah jumlah yang harus dibayar

<p>Pembahasan :</p><p>a. <strong>Mencari harga sebuah buku dan sebuah pulpen&nbsp;</strong></p><p>Jika x = buku dan y = pulpen, maka</p><ul><li>Paket belajar = 8x + 4y</li><li>Paket membaca = 5x</li></ul><p>&nbsp;</p><ul><li>2 Paket belajar = Rp. 72.000</li></ul><p>&nbsp; &nbsp; &nbsp; 1 Paket belajar = Rp. 36.000</p><ul><li>2 Paket Membaca + 1 Paket belajar = Rp. 71.000</li></ul><p>&nbsp; &nbsp; &nbsp; 2 Paket Membaca + Rp. 36.000 = Rp. 71.000</p><p>&nbsp; &nbsp; &nbsp; 2 Paket Membaca = Rp. 71.000 - Rp. 36.000</p><p>&nbsp; &nbsp; &nbsp; 2 Paket Membaca = Rp. 35.000</p><p>&nbsp; &nbsp; &nbsp; 1 Paket Membaca = Rp. 17.500</p><p>&nbsp; &nbsp; &nbsp; &nbsp;5x = 17.500</p><p>&nbsp; &nbsp; &nbsp; &nbsp;x = 17.500 : 5</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; = Rp. 3.500</p><p>&nbsp; &nbsp; &nbsp; &nbsp;Harga sebuah buku adalah <strong>Rp. 3.500;</strong></p><p>&nbsp;</p><p>&nbsp; &nbsp; &nbsp; 8x + 4y = 36.000</p><p>&nbsp; &nbsp; &nbsp; 8(3.500) + 4y = 36.000</p><p>&nbsp; &nbsp; &nbsp; 28.000 + 4y = 36.000</p><p>&nbsp; &nbsp; &nbsp; 4y = 36.000 - 28.000</p><p>&nbsp; &nbsp; &nbsp; 4y = 8000</p><p>&nbsp; &nbsp; &nbsp; y = 8000 : 4</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; = 2.000</p><p>&nbsp; &nbsp; &nbsp; &nbsp;Harga sebuah pulpen adalah <strong>Rp. 2.000</strong></p><p>&nbsp;</p><p>b. Harga Paket Belajar = <strong>Rp. 36.000</strong></p><p>&nbsp; &nbsp; &nbsp; Harga Paket Membaca =<strong> Rp. 17.500</strong></p><p>&nbsp;</p><p>c. Harga 5 Paket Belajar dan 3 Paket Membaca</p><p>&nbsp; &nbsp; &nbsp;5 Paket Belajar dan 3 Paket Membaca = 5(36.000) + 3(17.500)</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; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; = &nbsp;180.000 + &nbsp;52.500</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; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; =<strong> Rp. 232.500;</strong></p><p>&nbsp; &nbsp; &nbsp; &nbsp;</p><p>&nbsp;</p>