Looking for trustworthy answers? Westonci.ca is the ultimate Q&A platform where experts share their knowledge on various topics. Join our platform to get reliable answers to your questions from a knowledgeable community of experts. Join our platform to connect with experts ready to provide precise answers to your questions in different areas.

Find the indicated sum or difference 9-12:
9. 5+7
10. 7+(-9)
11. -5+20
12. -(-11)-7