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PERSAMAAN LINEAR SATU VARIABEL




                                      KELAS
                                         VII
                             SEMESTER GASAL



Oleh : Dra. ZSASHA MEICHAN
1.   Jakarta adalah Ibu kota Indonesia
2.   Gunung Merapi terletak di Jawa Tengah
3.   8>5
4.   3+5=8




                                        1.    Tugu Monas terletak di Jogjakarta
                                        2.    Matahari terbenam di arah timur
                                        3.    8 - ( - 2 ) > 10
                                        4.    -3 + 5 = 8




         1. Rasa buah rambutan manis sekali
         2. Makan makanan yang bergizi
1.   Jakarta adalah Ibu kota Indonesia                Kalimat kalimat ini adalah
 2.   Gunung Merapi terletak di Jawa Tengah            kalimat yang berupa fakta
 3.   8>5                                              dan bernilai benar
 4.   3+5=8
                                                   PERNYATAAN
                                                   Yang BENAR

Kalimat kalimat ini adalah
                                         1.   Tugu Monas terletak di Jogjakarta
kalimat yang berupa fakta
                                         2.   Matahari terbenam di arah timur
dan bernilai salah
                                         3.   8 - ( - 2 ) > 10
                        PERNYATAAN       4.   -3 + 5 = 8
                        Yang SALAH


                                                       Kalimat kalimat ini adalah
1. Rasa buah rambutan manis sekali
                                                       kalimat yang BUKAN
2. Makan makanan yang bergizi
                                                       berupa fakta


                                               BUKAN PERNYATAAN
1.   Jakarta adalah Ibu kota Indonesia
2.   Gunung Merapi terletak di Jawa Tengah
3.   Tugu Monas terletak di Jogjakarta
4.   Matahari terbenam di arah timur
5.   8 - ( - 2 ) > 10
6.   -3 + 5 = 8
7.   8>5
8.   3+5=8

PERNYATAAN              Kalimat yang dapat ditentukan nilai KEBENARANNYA
                        (bernilai benar atau salah)


        Sekarang perhatikan kalimat-kalimat berikut ini
            1. Indonesia terletak di Benua X
            2. 3 – a = 6
            3. Y x 5 = 15
                    Kita tidak tahu Kalimat ini bernilai benar atau salah,
                    Karena kalimat ini memuat sesuatu
1. Indonesia terletak di Benua x
2. 3 – a = 6        1. Indonesia terletak di Benua X
3. Y x 5 = 15       Akan menjadi sebuah pernyataan yang bernilai benar jika x
                      diganti dengan ASIA

                   2. 3 – a = 6
                   Akan menjadi sebuah pernyataan yang benar jika a diganti
                      dengan – 3

                   3. Y x 5 = 15
                   Akan menjadi sebuah pernyataan yang benar jika y diganti
                       dengan 3


    Kalimat yang mengandung sesuatu yang, jika
       sesuatu itu diganti akan mengubah kalimat
       tersebut menjadi sebuah pernyataan yang
       bernilai salah atau benar disebut sebagai Kalimat
       TERBUKA
                                            Maka
Dan “sesuatu” itu disebut variabel
                                            KALIMAT TERBUKA adalah kalimat yang
                                               memuat variabel dan belum diketahui
                                               nilai kebenarannya

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Persamaan Linear Satu Variabel

  • 1. PERSAMAAN LINEAR SATU VARIABEL KELAS VII SEMESTER GASAL Oleh : Dra. ZSASHA MEICHAN
  • 2. 1. Jakarta adalah Ibu kota Indonesia 2. Gunung Merapi terletak di Jawa Tengah 3. 8>5 4. 3+5=8 1. Tugu Monas terletak di Jogjakarta 2. Matahari terbenam di arah timur 3. 8 - ( - 2 ) > 10 4. -3 + 5 = 8 1. Rasa buah rambutan manis sekali 2. Makan makanan yang bergizi
  • 3. 1. Jakarta adalah Ibu kota Indonesia Kalimat kalimat ini adalah 2. Gunung Merapi terletak di Jawa Tengah kalimat yang berupa fakta 3. 8>5 dan bernilai benar 4. 3+5=8 PERNYATAAN Yang BENAR Kalimat kalimat ini adalah 1. Tugu Monas terletak di Jogjakarta kalimat yang berupa fakta 2. Matahari terbenam di arah timur dan bernilai salah 3. 8 - ( - 2 ) > 10 PERNYATAAN 4. -3 + 5 = 8 Yang SALAH Kalimat kalimat ini adalah 1. Rasa buah rambutan manis sekali kalimat yang BUKAN 2. Makan makanan yang bergizi berupa fakta BUKAN PERNYATAAN
  • 4. 1. Jakarta adalah Ibu kota Indonesia 2. Gunung Merapi terletak di Jawa Tengah 3. Tugu Monas terletak di Jogjakarta 4. Matahari terbenam di arah timur 5. 8 - ( - 2 ) > 10 6. -3 + 5 = 8 7. 8>5 8. 3+5=8 PERNYATAAN Kalimat yang dapat ditentukan nilai KEBENARANNYA (bernilai benar atau salah) Sekarang perhatikan kalimat-kalimat berikut ini 1. Indonesia terletak di Benua X 2. 3 – a = 6 3. Y x 5 = 15 Kita tidak tahu Kalimat ini bernilai benar atau salah, Karena kalimat ini memuat sesuatu
  • 5. 1. Indonesia terletak di Benua x 2. 3 – a = 6 1. Indonesia terletak di Benua X 3. Y x 5 = 15 Akan menjadi sebuah pernyataan yang bernilai benar jika x diganti dengan ASIA 2. 3 – a = 6 Akan menjadi sebuah pernyataan yang benar jika a diganti dengan – 3 3. Y x 5 = 15 Akan menjadi sebuah pernyataan yang benar jika y diganti dengan 3 Kalimat yang mengandung sesuatu yang, jika sesuatu itu diganti akan mengubah kalimat tersebut menjadi sebuah pernyataan yang bernilai salah atau benar disebut sebagai Kalimat TERBUKA Maka Dan “sesuatu” itu disebut variabel KALIMAT TERBUKA adalah kalimat yang memuat variabel dan belum diketahui nilai kebenarannya