whys is 7-(-1) = 8, i don't understand why is it 8 how do you solve this!?

Answer 1

Two minuses make a plus.

7 + 1 = 8

http://www.mathsisfun.com/positive-negative-integers.html

Answer 2

draw a number line
put a dot at +7
go left negative one
when you go left negative, you go right

Answer 3

thank you ms sue and damon

Answer 4

You're welcome.