Respuesta :

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Respuesta:

Explicación paso a paso:

20 ecuaciones de primer grado y sus soluciones:

  1. 2x + 3 = 7 → 2x = 4 → x = 2
  2. 3y - 2 = 8 → 3y = 10 → y = 10/3
  3. 4x + 5 = 9 → 4x = 4 → x = 1
  4. 5y - 6 = 11 → 5y = 17 → y = 17/5
  5. 6x + 7 = 10 → 6x = 3 → x = 1/2
  6. 7y - 8 = 12 → 7y = 20 → y = 20/7
  7. 8x + 9 = 13 → 8x = 4 → x = 1/2
  8. 9y - 10 = 14 → 9y = 24 → y = 24/9
  9. 10x + 11 = 15 → 10x = 4 → x = 2/5
  10. 11y - 12 = 16 → 11y = 28 → y = 28/11
  11. 12x + 13 = 17 → 12x = 4 → x = 1/3
  12. 13y - 14 = 18 → 13y = 32 → y = 32/13
  13. 14x + 15 = 19 → 14x = 4 → x = 1/7
  14. 15y - 16 = 20 → 15y = 36 → y = 36/15
  15. 16x + 17 = 21 → 16x = 4 → x = 1/4
  16. 17y - 18 = 22 → 17y = 40 → y = 40/17
  17. 18x + 19 = 23 → 18x = 4 → x = 1/9
  18. 19y - 20 = 24 → 19y = 44 → y = 44/19
  19. 20x + 21 = 25 → 20x = 4 → x = 1/5
  20. 21y - 22 = 26 → 21y = 48 → y = 48/21

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