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<p>Yuks kita bahas ........</p><p>x + y = 4 &nbsp; &nbsp; (1)</p><p>2x - y = 2 &nbsp; (2)</p><p>&nbsp;</p><p>A. Menentukan titik potong Sumbu x dan sumbu y</p><p>Tabel (1)</p><p>x &nbsp;| &nbsp;0 &nbsp; | &nbsp;4 &nbsp; |</p><p>y &nbsp;| &nbsp;4 &nbsp; | &nbsp; 0 &nbsp;|</p><p>Jadi garis x + y = 4 memotong sumbu y &nbsp;di (0,4) dan memotong sumbu x di (4,0).</p><p>&nbsp;</p><p>Tabel (2)</p><p>x &nbsp;| &nbsp;0 &nbsp; &nbsp; | &nbsp;1 &nbsp; |</p><p>y &nbsp;| &nbsp;-2 &nbsp; | &nbsp; 0 &nbsp;|</p><p>Jadi garis 2x - y = 2 memotong sumbu y &nbsp;di (0,-2) dan memotong sumbu x di (1,0).</p><p>&nbsp;</p><p>b. Grafik ada dibawah. Penyelesaian dari garis (1) dan (2) adalah {(2,2)}</p><p>&nbsp;</p><p>c. Menentukan Titik potong garis (1) dan (2) dengan metode Eliminasi&nbsp;</p><p>&nbsp; &nbsp; &nbsp;dan substitusi</p><p>&nbsp;&nbsp;<strong> &nbsp;Eliminasi variabel y untuk mendapatkan nilai x</strong></p><p>&nbsp; &nbsp; &nbsp; x + y = 4</p><p>&nbsp; &nbsp;&nbsp;<u> 2x - y = 2&nbsp;</u> +</p><p>&nbsp; &nbsp; &nbsp;3x &nbsp; &nbsp; &nbsp; = 6</p><p>&nbsp; &nbsp; &nbsp;x = 2</p><p>&nbsp; &nbsp; &nbsp;<strong>Substitusikan x = 2 ke persamaan (1)</strong></p><p>&nbsp; &nbsp; &nbsp;x + y = 4</p><p>&nbsp; &nbsp; 2 + y = 4</p><p>&nbsp; &nbsp; y = 4 - 2</p><p>&nbsp; &nbsp; y = 2</p><p>&nbsp; &nbsp; Jadi himpunan penyelesaiannya aadalah {(2,2)}</p>