Respuestas
Respuesta dada por:
2
5X - 4Y = 2
2X + 3Y = 17/4
hallamos el determinante
![\left[\begin{array}{ccc}5&-4\\2&3\\\end{array}\right] =23](https://tex.z-dn.net/?f=++%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7D5%26amp%3B-4%5C%5C2%26amp%3B3%5C%5C%5Cend%7Barray%7D%5Cright%5D+%3D23 "\left[\begin{array}{ccc}5&-4\\2&3\\\end{array}\right] =23")
Δ=23
Reemplazamos para hallar ΔX
![\left[\begin{array}{ccc}2&-4\\17/4&3\\\end{array}\right] =23](https://tex.z-dn.net/?f=++%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7D2%26amp%3B-4%5C%5C17%2F4%26amp%3B3%5C%5C%5Cend%7Barray%7D%5Cright%5D+%3D23 "\left[\begin{array}{ccc}2&-4\\17/4&3\\\end{array}\right] =23")
ΔX = 1:
Hallamos X = ΔX/Δ = 23/23 = 1
Ahora Hallamos ΔY
![\left[\begin{array}{ccc}5&2\\2&17/4\\\end{array}\right]=69/4](https://tex.z-dn.net/?f=%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7D5%26amp%3B2%5C%5C2%26amp%3B17%2F4%5C%5C%5Cend%7Barray%7D%5Cright%5D%3D69%2F4 "\left[\begin{array}{ccc}5&2\\2&17/4\\\end{array}\right]=69/4")
ΔY = 69/4
Y =ΔY/Δ = (69/4)/23 = 3/4
Rta: X = 1; Y = 3/4
2X + 3Y = 17/4
hallamos el determinante
Δ=23
Reemplazamos para hallar ΔX
ΔX = 1:
Hallamos X = ΔX/Δ = 23/23 = 1
Ahora Hallamos ΔY
ΔY = 69/4
Y =ΔY/Δ = (69/4)/23 = 3/4
Rta: X = 1; Y = 3/4
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