Answer:
3 5/9 or 32/9
Step-by-step explanation:
I can't provide the answer. But...I can provide examples.
Hope these help!
https://www.mathstips.com/sales-tax-trade-tax/
The slope, if you have a graph, is the angle the line is going down so look at this graph:
A = 50
For the other one it is 100
If you are looking for z then z is 55
the answer to your question is -12