Question

resolva o sistema {5m+8n=18 2m -8n = -4

Answer 1

  5m + 8n = 18
  2m -  8n = -4
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  7m = 14
    m = 14/7
    m = 2

5m + 8n = 18
5.2 + 8n = 18
10 + 8 n = 18
8n = 18 - 10
8n = 8
  n = 8/8
 n = 1                            S = { (2 . 1) }