Question 1014647
let L equal how much is left over and let T equal the price of a t-shirt.


one equation would be L = 200 - 90 - 3T


the expression for how much money is left over would be 200 - 90 - 3T


this can be simplified to 110 - 3T.


that's really the same expression after it's been simplified.


not sure if that counts as different.


another expression might be 200 - 3 * 30 - 3T


they're all just different forms of the same expression though.


so .....


200 - 90 - 3T
200 - 3 * 30 - 3T
110 - 3T


another way might be 200 - (90 + 3T)


that's different, but still just another form of the same expression.


still another would be 200 - (3 * 30 + 3T)


i would go with 200 - 90 - 3T and 110 - 3T.


they look like different expressions even though they wind up giving you the same answer.


looking at 110 - 3T separately, though, you would have no idea that it came from 200 - 90 - 3T, unless you knew up front that's where it came from.


if you look at 200 - (90 + 3T), you could figure out that another form of that equation would be 200 - 90 - 3T without knowing that the other form was 200 - 90 - 3T.


so the one that is sufficiently different from the others is 110 - 3T.


i'd go with 200 - 90 - 3T and 110 - 3T.