Answer:
i tried but i dont understand sorry
Step-by-step explanation:
Answer:
7
Step-by-step explanation:
20 - 12 = 8
15 - b = 8
-b = 8 - 15
b = 7 ( -ve signs will become +ve)
When plugging this into the calculator, you find:

The answer would be 8.9.
Answer: 7
Step-by-step explanation: 26/2 = 13 _+6=13? 7