We are given equation: 34b−23b=−9.
We can see 34b and 23b both has b's with them.
So, we can combine like terms.
Comining means addition or subtaction.
We have minus sign in between 34b and 23b.
So, we need to subtract 34b and 23b.
On subtracting, we get
11b.
Therefore, we get
11b = -9.
Now, we need to divide by 11 on both sides. We get on dividing
b = -9/11.
Therefore, -9/11 can be enter in the boxes to write an equation that is equivalent to 34b−23b=−9.