Answer:
-6
Explanation:
=-9+5-7+5
=(-9+5)-7+5
=-4-2
=-6
You owe someone 9pencils,and the person came for the pencils. You now have 5pencils, and you gave them out to the person .You will be left with 4 pencils to give the person since you have given him/her 5 of them.
You this same person owe another person 7pencils,So when you sum up the number of pencils you owe before the current one (-4+(-7))which is equivalent to -11.
The owners of the pencils then come for their pencils. You only have another 5 pencils and then you share it among them, you will be left with 6 pencils more to give out.
NB:Minus(-) means you owe and the plus(+) means add or you have.