Question 427417
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Hi, Yes! You are exactly corect
Solving by the elimination method 
5r - 8s = -3
8r + 5s = 102 

25/8r - 5s = -3*5/8   |multiplying 1st EQ by 5/8
 8r   + 5s = 102 
  89/8 r = -15/8 + 102
    89r  = -15 + 816
    89r = 801
      r = 9   and s = (5r+3)8 = 48/8=6