Answer:
b = -17
Step-by-step explanation:
-2b - 12 = 22
+12 +12
-2b = 34
-2b/-2 34/-2
b = -17
37.5% is what I think the correct answer is sorry if its wrong
We are given
The current exchange rate is 2 guilders for every 3 florins
so,
2 guilders = 3 florins
now, we can find for 1 guilders
so, we get

now, we can multiply both sides by 17

now, we can simplify it

so, option-A........Answer