Uang adik dan kakak Rp15. 000 2 kali uang kakak ditambah uang adik berjumlah Rp 60.000. Jumlah masing masing uang mereka ialah?

<p>Dimisalkan:</p><p>X+Y = Rp15.000</p><p>X+2Y= 60.000</p><p>&nbsp;</p><p>Substitusi = X+2Y = 60.000</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;X+Y &nbsp; &nbsp;= 15.000</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;_____________-</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; Y = 45.000</p><p>Mencari X</p><p>X+Y=15.000</p><p>X+45.000 = 15.000</p><p>X = 15.000 - 45.000</p><p>X = -30.000</p><p>&nbsp;</p><p>Jadi uang adik adalah -30.000 (Tidak masuk akal) dan uang kakak adalah 45.000</p><p>&nbsp;</p>