The cost of hiring a digger is £35 plus £7 per day.
Write a formula for the cost, £C, of hiring a digger for d days.
Find the cost of hiring a digger for 12 days.
A firm has a bill for £161 for the hire of a digger, for how many days did they hire it?
Mathbot Says...
I wasn't able to parse your question, but the HE.NET team is hard at work making me smarter.