Question

A used electronics store pays $30 for each cell phone, spends $20 refurbishing the phone, and sells the refurbished phone to a customer for $115.

a. Write an expression in simplest form that represents the company's earnings (in dollars) from buying, processing, and selling cell phones. Use x to represent the number of cell phones they sell.

An expression is ([answer]) dollars.

Answer 1

I am subtracting the amount it took to make the phone, from the amount they sell the phone to a customer for.
115-(30+20)=x


115-50=x

65=x