Question

Why is - t - 3 written as 3 - t? Is it wrong if it is left as -t -3?

Answer 1

-t-3 and 3-t are not the same since t-3 would result in a negative answer since both -t and -3 are negative. While in t-3 t is positive and -3 is negative. it is wrong if its left as t-3 since -t-3=3-t is false.