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Según yo van así ...
2x - 6y = 8 2x - 6y = 8 2x - 6y = 8
2x = 6y + 8 - 6y = - 2x + 8 2(4) - 6 (0) = 8
2x = 6 (0) +8 - 6y = -2(4) + 8 8 - 0 = 8
2x = 0 + 8 - 6y = - 8 + 8 8 = 8
2x = 8 - 6y = 0
x = 8/2 y = 0/-6
x = 4 y = 0
- 9x + 5y = - 14 - 9x + 5y = -14 - 9x + 5y = - 14
- 9x = - 5y - 14 5y = 9x - 14 - 9(1.55...6) + 5(0) = -14
- 9x = - 5(0) - 14 5y = 9(1.55...6) - 14 - 14 + 0 = - 14
- 9x = 0 - 14 5y = 14 -14 - 14 = - 14
- 9x = -14 5y = 0
x = -14/-9 y = 0/5
x = 1.55..6 y = 0
... Espero te sirva xP