Tolong jawabkan dengan lengkap dan tepat

<p>6x -5=z &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;9x2+27x-45=0</p><p>3x -y+6x-5= 8 &nbsp; &nbsp; &nbsp;(3x-15)(3x+3)=0</p><p>9x -y =13. &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; X =5 atau x=-1</p><p>9x-13=y. &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; Y = &nbsp;9 x 5 -13 = 32 atau -9-13=-21</p><p>Xy + 5 (6x-5)=20. &nbsp;Z = 6x5-5 =25 atau &nbsp;6(-1)-5=-11</p><p>xy+30x-25=20</p><p>xy+30x=45</p><p>x(9x-13)+30x =45</p><p>9x2-13x+30x-45=0</p><p>&nbsp;</p><p>&nbsp;</p><p>&nbsp;</p><p>&nbsp;</p><p>&nbsp;</p><p>&nbsp;</p><p>&nbsp;</p><p>&nbsp;</p><p>&nbsp;</p><p>&nbsp;</p><p>&nbsp;</p><p>&nbsp;</p><p>&nbsp;</p><p>&nbsp;</p><p>&nbsp;</p><p>&nbsp;</p><p>&nbsp;</p><p>&nbsp;</p><p>&nbsp;</p><p>&nbsp;</p><p>&nbsp;</p><p>&nbsp;</p><p>&nbsp;</p><p>&nbsp;</p><p>&nbsp;</p><p>&nbsp;</p><p>&nbsp;</p><p>&nbsp;</p><p>&nbsp;</p><p>&nbsp;</p><p>&nbsp;</p><p>&nbsp;</p><p>&nbsp;</p><p>&nbsp;</p><p>&nbsp;</p><p>&nbsp;</p><p>&nbsp;</p><p>&nbsp;</p><p>&nbsp;</p><p>&nbsp;</p><p>&nbsp;</p><p>&nbsp;</p><p>&nbsp;</p><p>&nbsp;</p><p>&nbsp;</p><p>&nbsp;</p><p>&nbsp;</p>