if you subtract a negative, it becomes a positive?

1-(-1)=1+1=2 ... yes

eg.)
2 - (-3)
= 2 + (-1)(-3)
= 2 + (+3)
= 2 + 3
= 5

Yes, 2 negatives a plus. one of each is a minus.

Well....if you subtract a negative the *result* tends toward the positive.

Does that make sense?

If you had: -4 and subtracted -1 you'd have: -4 - (-1) = -3

So....nothing actually became positive, but the result *tended* toward the positive. Meaning....the result "-3" is more positive than the "-4" is.

Hope this makes sense. You question was a little vague and I wasn't quite sure how much detail to include.

If you substract a negative number, the result will be as if you added its opposite
Example:
3 - (-5) = 3 + (5) = 8

In some cases it becomes positive and in some cases, it becomes negative.

Example 1:
-3 -2 = -5 (negative)

3-2 = 1 (Positive)

Let x = -7
Add 7 to both sides: x+7 = -7+7 = 0
Now minus x to both sides: x+7-x = 0-x
=> 7 = -x

But x=-7, hence 7 = -(-7).

Yeah but you change both signs to pluses instead of a subtraction sign

It does indeed !

Examples
5 - (- 2) = 5 + 2 = 7
( - 8 ) - ( - 5 ) = ( - 8 ) + 5 = (- 3 )