Minimum price calculation I have 5 laptops. I'd like to find the price which I can use to sell these laptops and after applying the 20% tax the net amount must not be less than 7000$
Taking these variables into account please show the formula how to calculate this price.

Let the sales price be $x$.  Then we find the desired sales price by solving $$x-0.20x=7000$$
This rearranges as $$0.8x=7000$$
Dividing both sides by $0.8$, we get $$x=\frac{7000}{0.8}=8750$$
