subtracting a negative number is the same as

a: adding a positive number
b: subtracting a positive number
c: subtracting a negative number
d: adding a negative number

A. Adding a positive number

That's where the term "Two negatives don't make a positive" came from

38+105= 143, 39+104=143, and you will find then adding the numbers on opposite sides, moving inwards yields the answer 138 every time. because of this, you’re going to multiply 138 times the number of pairs, which is 34. therefore, 34*138= 4692(i’m sorry if it’s the wrong numbers, but it’s the right concept)