Bsk kumpul & tolong pakai cara

1. 3x<=9
x<=9+3
x<=12
2. -4x-3<=9-x
-4x+x<=9+3
-3x<=12
x<=-4
3. 5-2x>=x-1
-2x-x>=-1-5
-3x>=-6
x>=3
4. 4x<=9+x
4x-x<=9
3x<=9
x<=3

5. 8<8-3y
-3y<8-8
-3y<0
y<0