tolong di jawab bantu yaa

17. x - 5 = 2x + 1
x - 2x = 5 + 1
-x = 6
x = -6

18. 3x² + 5x - 3 = x² - x + 5
3x² - x² + 5x + x - 3 - 5 = 0
2x² + 6x - 8 = 0
x² + 3x - 4 = 0
(x - 1)(x + 4) = 0
x = 1  atau  x = -4

19. x² - 2x - 1 = 2 - x - x²
x² + x² - 2x + x - 1 - 2 = 0
2x² - x - 3 = 0
(2x - 3)(x + 1) = 0
x = 3/2   atau  x = -1

20. x² - 4x + 3 = 2x - 5
x² - 4x - 2x + 3 + 5 = 0
x² - 6x + 8 = 0
(x - 2)(x - 4) = 0
x = 2   atau  x = 4