1)
2(3x-5)
Use the distributive property.
2(3x)+2(-5)
6x-10
That is not equal to 6x-8.
2)
2-2+5x
Simplify the like terms, 2 and -2
Add them together, 0
5x=5x the two expressions are equal
3)
2x+8 because there are x stickers in a pack
2(4+x)=2(4)+2(x)=8+2x=2x+8
Yes they are the same expressions.