Hi,im an 8th grader and i have a project called "Cell Phone Brochure " and i need help,on the rubric it says we have to have a monthly plan that should include 2 services & minutes of use and a access flat rate..i don't under stand???!!! and i really don't understand when it says: You must write & solve an equation for your product using variables to represent the services & ccalculate the monthly bill..i i ddon'tknow what it means when it says solve an equation,can someone explain or break it down ?