Plz somebody! question worth full 34 points.. big shout out to anybody who answers.. will mark a !

melissa has a choice of two phone plans. the first plan has a monthly fee of $40 and charges $0.50 per additional peak minute over included minutes. the second plan has a monthly fee of $50 and charges $0.25 per additional peak minute over an equal number of included minutes. graph the system of linear equations. find the number of additional peak minutes for which the second plan will be as cheap as the first, and tell how much melissa would pay for that month.