bagaimana cara menyelesaikan soal spltv ini

<p>2x-5y+3z=-10 ... (1)<br>3x+4y+7z=11 ... (2)<br>5x+3z+7z=-8 &nbsp;... (3)</p><p>&nbsp;</p><p>#Eliminasi variabel z pada persamaan (1) dan (2)<br>2x &nbsp;- 5y &nbsp;+ 3z = -10 &nbsp; | ×7<br>3x + 4y &nbsp;+ 7z = 11 &nbsp; &nbsp; | ×3<br>__________________<br>14x-35y+21z=-70<br>9x+12y+21z=-33<br>_________________-<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 5x-47y=-37 ... (4)</p><p>#Eliminasi variabel z pada persamaan (2) dan (3)<br>3x+4y+7z=11<br>5x+3z+7z=-8&nbsp;<br>_____________ -<br>&nbsp; &nbsp; &nbsp; &nbsp;-2x+y=-3 &nbsp;... (5)</p><p>#Eliminasi x pada persamaan (4) dan (5)<br>5x-47y=-37 &nbsp; &nbsp;| ×2<br>-2x &nbsp; +y=-3 &nbsp; &nbsp; &nbsp;| ×5<br>______________<br>10x-94y=-74<br>-10x+5y=-15<br>_____________+<br>&nbsp; &nbsp; &nbsp; -84y=-84<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; y=-84/-84<br>&nbsp; &nbsp;<strong> &nbsp; &nbsp; &nbsp; &nbsp; y=1</strong></p><p>&nbsp;</p><p>#Substitusi y=1 ke persamaan (5)<br>-2x+y=-3<br>-2x+1=-3<br>&nbsp; &nbsp; -2x=-3-1<br>&nbsp; &nbsp; -2x=-4<br>&nbsp; &nbsp; &nbsp; &nbsp;x=-4/-2<br>&nbsp; &nbsp; &nbsp;&nbsp;<strong> x=2</strong></p><p>&nbsp;</p><p>#Substitusi x=2 dan y=1 ke persamaan (1)<br>&nbsp; &nbsp; &nbsp; &nbsp;2x-5y+3z=-10<br>2(2)-5(1)+3z=-10<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;4-5+3z=-10<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;-1+3z=-10<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 3z=-10+1<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 3z=-9<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; z=-9/3<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp;<strong>z=-3</strong></p><p>&nbsp;</p><p><strong>Jadi, HP={2,1,-3}</strong></p>