SOLUTION: Tim wants air conditioning in his room. The air conditioner costs $45. Each day the electricity costs $2. Write an expression that can be used to find the cost to run the air condi

Algebra ->  Equations -> SOLUTION: Tim wants air conditioning in his room. The air conditioner costs $45. Each day the electricity costs $2. Write an expression that can be used to find the cost to run the air condi      Log On


   

Question 537638: Tim wants air conditioning in his room. The air conditioner costs $45. Each day the electricity costs $2. Write an expression that can be used to find the cost to run the air conditioner for d days
If Tim spent $85 to cool his room, how many days did he run the air conditioner?
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
Tim wants air conditioning in his room. The air conditioner costs $45. Each day the electricity costs $2. Write an expression that can be used to find the cost to run the air conditioner for d days
---
Cost(d) = 45 + 2*d
-----
If Tim spent $85 to cool his room, how many days did he run the air conditioner?
Solvd: 45+2d = 85
2d = 40
d = 20 (# of days)
======================
Cheers,
Stan H.
======================