Cecilia wants to switch over to T-Mobile for the unlimited everything plan for $89.99 which includes 20GB of 4G LTE each month; if she goes over 20GB per month T-Mobile will charge Cecilia $10 for each 1 GB over her
limit. Mr. D wants to switch over to Cricket for the unlimited plan for $59.99 which includes 15GB of 4G LTE
per month, if he goes over the 15GB per month Cricket will charge Mr. D $5 for for each 1 GB over his limit.
Which system of equations represent the situation? Let x represent the overage of GB's each month.