This answer if needed.

How do you use the additive inverse to evaluate an expression that uses subtraction in a full sentence

Sara can take no more than 22 pounds of luggage on a trip.her suitcase weighs 112 ounces.how many more pounds can she pack without going over the limit?

Olga bought a new skirt that cost $20. sales tax is 5%. how much did olga pay, including sales tax? 7.