Answer:
b=2
Step-by-step explanation:
You need to simplify as much as you can before doing anything else.
You can simplify -9/3 to -3! You’re dividing a negative by a positive, which means the answer for that will still be negative.
Now, you have -3+b=-1. Subtract -3. But, you’re subtracting a negative, which means you’ll be adding a positive! So, you’re doing -1 + 3. That gets you 2.
So, b= 2.
:)
