Question

suppose a refrigerator sells for $700 per and costs $85 a year for electricity. write the expression for the cost to buy and run the refrigerator for x years?

Answer 1

X=700R+85Y
R= Number of Refrigerators
Y= Number of Years 

Answer 2

Cost of refrigerator = $700

Cost of electricity per year = $85

So cost of electricity for x years = $85x

Run the refrigerator for x years

Total cost to buy and run the refrigerator for x years = cost of refrigerator + cost of electricity for x years

Total cost to buy and run the refrigerator for x years = 700 + 85x