diketahui a + b =1, b + 2c = 2 dan b tidak sama dengan nol, jika a + nb + 2018c= 2019 maka nilai n adalah....?

<p>Jawaban <strong>1015</strong></p><p>&nbsp;</p><p><strong>Pembahasan&nbsp;</strong></p><p>a + b = 1</p><p>&lt;=&gt; b = 1 - a</p><p>&nbsp;</p><p>b + 2c = 2</p><p>&lt;=&gt; (1 - a) + 2c = 2</p><p>&lt;=&gt; 2c = 1 + a</p><p>&lt;=&gt; c = ½(1 + a)&nbsp;</p><p>&nbsp;</p><p>a + nb + 2018c = 2019</p><p>&lt;=&gt; a + nb + 2018. ½(1 + a) = 2019</p><p>&lt;=&gt; a + nb + 1014 + 1014a = 2019</p><p>&lt;=&gt; 1015a + nb= 1015</p><p>&lt;=&gt; nb = 1015 - 1015a</p><p>&lt;=&gt; nb = 1015(1 - a)&nbsp;</p><p>&lt;=&gt; n(1 - a) = 1015(1 - a)&nbsp;</p><p>&lt;=&gt; n = 1015</p><p>&nbsp;</p><p>Nilai n = 1015</p><p>&nbsp;</p><p>&nbsp;</p>