Answer:
The original price of object is $20
Step-by-step explanation:
Given : An object is sold for a price with a 7% tax. The final price is then $21.40.
We have to find the original price.
Since the final price includes the original price and tax paid.
So $ 21.40 includes original price and tax paid.
Let original price is x, then
Tax paid is 7% of original price that is 
Thus, 
Simplify, for x,


we have,

Divide both side by 1.07 . we have,
x = 20
Thus, the original price of object is $20