Please I need to know how to set this equation up by 12/18(today) at 9 pm!! Thank you!!

Question

Mickey has 1.95 in his collection,consisting of quarters and nickels.The number of nickles is three more than the number of quarters.

Answer 1

                                .O5N +.25 Q= 1.95

                                  5N + 25 Q=195   multiply by 100

                                  5(Q +3) +25 Q =195 sub in q+3 for n

                                  5 Q +15 +25 Q=195

                                   30 Q = 180

                                        Q=6

                                 

three more nickels than quarters  n=q +3

                                                  n=6+3

                                                   n=9

check; 9(.05) + 6(.25)= 1.95

             .45   +1.50    = 1.95