How do I complete the following distributive property/combining like terms problems?

1) 2(x + 3)=
2) 15y-6y=
3) 3x-(-9x)=
4) 9y-6+5y=
5) -4n+3(2+n)=
6) 10n-7+6(n+5)=
7) (5) (-2)-3=
8) -11y+2(y-3)=

Question

How do I complete the following distributive property/combining like terms problems?

1)  2(x + 3)=
2)  15y-6y=
3)  3x-(-9x)=
4)  9y-6+5y=
5)  -4n+3(2+n)=
6)  10n-7+6(n+5)=
7)  (5) (-2)-3=
8)  -11y+2(y-3)=

anonymous · Answer

1)2x+6
2)9y
3)12x
4)4y-6=2(2y-3)
5)3-n
6)4n-23
7)30
8)-3(3y-2)

anonymous · Answer

oops sorry i made small mistake...
8)-3(y+2)

anonymous · Answer

can you explain number 4 and number 5?

anonymous · Answer

yep...in number 4 5y is subtracted by 9y which gives 4y...and according to question it becomes 4y-6 and if we take 2 as common then we get answer 2(2y-3)

anonymous · Answer

-4n+6+3n(cause as given in question 3 is multiplies with 2 and n)
and again 3n is subtracted by 4n so the answer become (6-n)