tolong jawab no 6 sampai 10 pakai caranya

6. (3a-6) : (a +3) ( a-2)
3(a-2) : (a+3)(a-2)
a : a+3

7. 2x + 7 = x-5
7+5= x-2x
-1x = 12
x = -12
-12-8 = -20

8. 10x -6 = 3x + 15
7x = 21
x = 3

9. 2x + 3 = 4x - 7
4x - 2x = 10
2x = 10
x = 5

10. 3x-5 / 2 < 4x - 10 : 3
8x - 20 < 9x - 15
9x - 8x < -20 + 15
x < -5
{...,...,-8,-7,-6}