Tolong jawab secepatnya

<p>Buku= x</p><p>Pensil= y</p><p>Penghapus =z</p><p>4x +3y= 41.000 pers....1</p><p>2y+3z= 44.000 pers....2</p><p>X+2z= 25.000 pers.....3</p><p>Jawab:&nbsp;</p><p>1. Eliminasikan persamaan 2 dan persamaan 3</p><p>&nbsp; &nbsp; &nbsp; 2y+3z= 44.000 ×2</p><p>&nbsp; &nbsp; &nbsp;&nbsp;<u>X+2z= 25.000 &nbsp; ×3 &nbsp; &nbsp; &nbsp; &nbsp;</u></p><p>&nbsp; &nbsp; &nbsp; 4y+6z= 88.000</p><p>&nbsp; &nbsp; &nbsp;&nbsp;<u>3x+6z=75.000 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; -</u></p><p>&nbsp; &nbsp; &nbsp; 4y-3x=13.000 pers.....4</p><p>&nbsp;2. Eliminasikan persamaan 4 dan persamaan 1</p><p>&nbsp; &nbsp; &nbsp; &nbsp;4y-3x=13.000 x4</p><p>&nbsp; &nbsp; &nbsp; &nbsp;<u>3y+4x=41.000 x3 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;</u></p><p>&nbsp; &nbsp; &nbsp; &nbsp; 16y-12x=52.000</p><p>&nbsp; &nbsp; &nbsp; &nbsp;&nbsp;<u> 9y+12x=123.000 &nbsp; &nbsp; &nbsp;+</u></p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 25y=175.000</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;y= <u>175.000</u></p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;25</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; y= 7.000</p><p>3. Substitusikan y= 7.000 ke pers...1</p><p>&nbsp; &nbsp; &nbsp; 4x +3y= 41.000</p><p>&nbsp; &nbsp; &nbsp; &nbsp;4x+3(7.000)=41.000</p><p>&nbsp; &nbsp; &nbsp; &nbsp; 4x+21.000=41.000</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 4x=41.000-21.000</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; X= <u>20.000</u></p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;4</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; X=5.000</p><p>4. Substitusikan X=5.000 ke pers...3</p><p>&nbsp; &nbsp; &nbsp; X+2z= 25.000</p><p>&nbsp; &nbsp; &nbsp; 5.000+2z= 25.000</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 2z=25.000-5.000</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; Z= <u>20.000</u></p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 2</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; Z= 10.000</p><p>Jadi, harga 1 buku, 1 pensil, dan 1 penghapus adalah 7.000, 5.000, dan 10.000</p><p>&nbsp;</p>