Jawabanmu

2014-08-26T21:36:35+07:00
20y-100
5x^2-x+25x-5=5x^2+24x-5
14x-49-4x^2+14x=-4x^2+28x-49
2014-08-26T22:03:11+07:00
20y - 100

5x² - x + 25x -5x = 5x² + 19x