Question 93884
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I am stuck on this problem. Please help? 
Find values for m and b so that the solution
can be (-3,4).

5x + 7y =  b
mx +  y = 22

Plug in x = -3 and y = 4 in each equation and 
solve the resulting equations for m and b.

     5x + 7y =  b
5(-3) + 7(4) =  b
    -15 + 28 =  b
          13 = b
         
     mx +  y = 22
m(-3) +  (4) = 22
    -3m +  4 = 22 
         -3m = 18
           m = -6

Edwin</pre>