disitu tempat parkir terdapat sepeda motor dan mobil sebanyak 12 buah dan banyaknya seluruh roda 36 buah jika tarif parkir sepeda motor 2000 dan tarik parkir mobil 3000 berapakah pendapatan tukang parkir

<p>Misalkan <strong>a = motor</strong> dan <strong>b = mobil</strong>, maka kalimat matematikanya :</p><p>a + b = 12 &nbsp;--&gt; a = 12 - b &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; ....(1)</p><p>2a + 4b = 36 --&gt; (dibagi 2) --&gt; a + 2b = 18 &nbsp; &nbsp; &nbsp; &nbsp;....(2)</p><p>&nbsp;</p><p><strong>Substitusikan persamaan (1) ke persamaan (2)</strong></p><p>a + 2b = 18 &nbsp;</p><p>(12 - b) + 2b = 18 &nbsp;</p><p>12 - b + 2b = 18</p><p>b = 18 - 12 = 6</p><p>Banyaknya mobil = 6</p><p>&nbsp;</p><p><strong>Substitusikan b = 6 ke &nbsp;persamaan (1)</strong></p><p>a = 12 - b &nbsp; &nbsp;</p><p>a = 12 - 6 = 6</p><p>Banyaknya motor = 6</p><p>&nbsp;</p><p><strong>Menetukan pendapatan Parkir</strong></p><p>Pendapatanb parkir = 6(2000) + 6(3000)</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;= 12.000 + 18.000</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;= Rp. 30.000;</p><p>Jadi Pendapatan parkirnya adalah <strong>Rp. 30.000;</strong></p>