43.) a. There is an s amount of shoes, because s is the total amount of shoes b. x is the number of shoes, so x - 1/2 = s
44.) 2s + 7 = x
45.) the variable s is the total amount of shoes Pete has and 8 don't fit him anymore (or got ruined) so he threw them away... x - 8
46.) The expressions y + 4 and 1y + 4 are equivalent, because a variable always has a hidden (1) next to it like (1)y and any positive number multiplied by 1 always stays the same.
