It is -129/500
I hope this is the answer you are looking for
There are two real number solutions for that equation.
The answer to the question is 210
Answer:Store A
Step-by-step explanation:
Given
Store A sells 3 cells phones that cost $165 each and offer 4 th one free
i.e. Effective cost of each cell phone is 
Store B sells each cell phone at
each
clearly, store A provides a better deal than B because the cost of 4 cell phones is less for Store A i.e.
