You got E, Mr. Ridha. Excellent!
See brother Reflus, how to solve it! Salam, ZulTan, L, 51, Bogor If you don't know where you are going, any road will take you nowhere - Henry Kissinger -----Original Message----- From: Ahmad Ridha <ahmad.ri...@gmail.com> Sender: rantaunet@googlegroups.com Date: Fri, 18 Nov 2011 23:57:58 To: <rantaunet@googlegroups.com> Reply-To: rantaunet@googlegroups.com Subject: Re: [R@ntau-Net] OOT: Matematika 62 a. aX = 108, where a is the number of phonecards bought, and X is the price for one phonecard. b. (a - 2) (X + 2) c. (a - 2) (X + 2) = 108 + 20 aX + 2a - 2X - 4 = 128 X = 108/a 108 + 2a - 216/a = 132 2a - 216/a = 24 a - 108/a - 12 = 0 a^2 - 12a - 108 = 0 a = 18 Wassalaam, -- Abu 'Abdirrahman, Ahmad Ridha bin Zainal Arifin bin Muhammad Hamim (l. 1400 H/1980 M) 2011/11/18 ZulTan <zul_...@yahoo.com> > > Ko matematika SMP: > > A shop keeper bought some phonecards $108. He paid $X for each. > > a. Find, in term of X, an expression for the number of phonecards he > bought. > > b. He gave away two number of phonecards to his son and sold remainder > for $2 per card more than he paid for it. Write down an expression in term > of X for the some money he received. > > c. He made $20 profit. Write down the equation and solve it to find the > number of phonecards he bought. > > Mungkin ado nan nio mancubo utak-atiak dipersilakan. > > Salam, > ZulTan, L, 51, Bogor > -- . * Posting yg berasal dari Palanta RantauNet, dipublikasikan di tempat lain wajib mencantumkan sumber: ~dari Palanta R@ntauNet http://groups.google.com/group/RantauNet/~ * Isi email, menjadi tanggung jawab pengirim email. =========================================================== UNTUK DIPERHATIKAN, melanggar akan dimoderasi: - DILARANG: 1. E-mail besar dari 200KB; 2. E-mail attachment, tawarkan di sini & kirim melalui jalur pribadi; 3. One Liner. - Anggota WAJIB mematuhi peraturan serta mengirim biodata! Lihat di: http://forum.rantaunet.org/showthread.php?tid=1 - Tulis Nama, Umur & Lokasi disetiap posting - Hapus footer & seluruh bagian tdk perlu dlm melakukan reply - Untuk topik/subjek baru buat email baru, tdk mereply email lama & mengganti subjeknya. =========================================================== Berhenti, bergabung kembali, mengubah konfigurasi/setting keanggotaan di: http://groups.google.com/group/RantauNet/ -- . * Posting yg berasal dari Palanta RantauNet, dipublikasikan di tempat lain wajib mencantumkan sumber: ~dari Palanta R@ntauNet http://groups.google.com/group/RantauNet/~ * Isi email, menjadi tanggung jawab pengirim email. =========================================================== UNTUK DIPERHATIKAN, melanggar akan dimoderasi: - DILARANG: 1. E-mail besar dari 200KB; 2. E-mail attachment, tawarkan di sini & kirim melalui jalur pribadi; 3. One Liner. - Anggota WAJIB mematuhi peraturan serta mengirim biodata! Lihat di: http://forum.rantaunet.org/showthread.php?tid=1 - Tulis Nama, Umur & Lokasi disetiap posting - Hapus footer & seluruh bagian tdk perlu dlm melakukan reply - Untuk topik/subjek baru buat email baru, tdk mereply email lama & mengganti subjeknya. =========================================================== Berhenti, bergabung kembali, mengubah konfigurasi/setting keanggotaan di: http://groups.google.com/group/RantauNet/
