tolong sama caranya ?........

Materi : Program Linear
Bahasan : Persamaan Linear 1 Variabel
Jawaban : x = - 1/5

Langkah - langkah :
Kali silang
(2x - 1) (x - 5) = (2x + 3) (x + 3)
2x² - 10x - x + 5 = 2x² + 6x + 3x + 9
2x² - 2x² - 6x - 3x - 10x - x = 9 - 5
- 20x = 4
x = - 4/20
x = - 1/5

(2x-1)(x-5) = (2x+3)(x+3)
2x² - 10x - x + 5 = 2x² + 6x + 3x + 9
2x² - 11x + 5 = 2x² + 9x + 9
2x² - 2x² - 11x - 9x + 5 - 9 = 0
-20x - 4 = 0
-20x = 4
x = -1/5