Remember that when adding positive and negative numbers,there are a couple of rules to follow. For example, in this case:
[tex]-8+6[/tex]
first, notice that since 8 is greater than 6, then the result will be a negative number.
Then, we substract 6 from 8 to get 2, so the final result would be:
[tex]-8+6=-2[/tex]
Next, if we want to add two negative numbers, then we add the numbers and keep the negative sign, for example:
[tex]-2-3[/tex]
Notice that 2 plus 3 is 5, and since both 2 and 3 are negative,we have that:
[tex]-2-3=-5[/tex]
If we want to substract a negative number from another negative number, like in thiscase:
[tex]-9-(-4)[/tex]
just remember that anything that is inside of a parenthesis with a negative sign will change its sign, then, we have the following:
[tex]-9-(-4)=-9+4[/tex]
applying the same rules as before we have:
[tex]-9+4=-5[/tex]
On the remaining cases, we have the following results:
[tex]\begin{gathered} 5-7=-2 \\ +4+3=7 \end{gathered}[/tex]
