Dominik hires a satellite phone. His total hire charge is £860. For how many weeks did he hire the phone? (Total hire charge = No. of week X 90 +50)
- Rearrange the formula so that it is equal to what the question is asking for (no. of weeks)What you have to do to one side you must do to the other!Total hire charge - 50 = No. of weeks X 90 (Total hire charge - 50) / 90 = No. of weeks 2. Enter the information given into the formula (total hire charge = 860)(860 -50) / 90 = No. of weeks 3. Calculate the answer810 /90 = No.of weeks 9 = No. of weeks Therefore the answer is 9 weeks.
