Answer:
100-6n, 58 stickers
Step-by-step explanation:
100-6n is our expression because Raf starts with 100 stickers, but gives away (so subtraction) n stickers to each of his 6 cousins, hence 6n.
Now we can solve the expression given n=7:
100-6*7=
100-42=
58 stickers left
I hope this helps! :)