James and theresa are raising money by selling candy bars at school. james has already saved up $12 on his own and he decides to sell the candy bars for $2 each. theresa didn't save any money but she decides to sell her candy bars for $3 each. which system of equations can be used to determine how many candy bars, c, each person must sell in order to have the same amount of money, m? what is the solution? show your work fully