Question 89285


     Find values for m and b in the following system so that the solution to the system
is (-3, 4).
5x +7y = b
mx + y = 22


  solution is (-3,4) hence  5(-3)+7(4) = b
                             -15 +28 = b
                                   b = 13 

               (-3,4)  hence m(-3)+4 = 22
                               -3m = 22-4
                               -3m = 18 
                                 m = -18/3 = -6

         Therefore the values of m = -6  and b = 13