20+(-14) is the same as 20-14, which is 6.
Likewise, if you subtract a negative number, such as 9-(-9), then it's the same as 9+9.
20+(-14) is the same as 20-14, which is 6.
Likewise, if you subtract a negative number, such as 9-(-9), then it's the same as 9+9.