(−8)−(−13)= (-8)-(-13)= (−8)−(−13)=
Let's remember the rule:
−(−x)=+x -(-x)=+x −(−x)=+x
Now let's write the exercise in the appropriate form:
−8+13= -8+13= −8+13=
We'll use the substitution law and solve:
13−8=5 13-8=5 13−8=5
5 5 5