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2Y - 3X = -10 ........(1)
5X - 6Y = 22 ........(2)
Despejar 2Y en (1):
2Y = 3X - 10 ...............(3)
Acotación:
3 x 2Y = 3(3X - 10)
Reemplazando (3) en (2):
5X - 3(3X - 10) = 22
5X - 9X + 30 = 22
-4X = 22 - 30
-4X = -8
X = (-8/-4)
X = 2 Reemplazando el valor de "X" en (1): 2Y = 3(2)-10 2Y = 6 - 10 Y = (-4/2) Y = -2
-3x + 2y = - 10
5x - 6y = 22
Solución:
-3x + 2y = - 10 ---> × (5)
5x - 6y = 22 ---> × (3)
Restamos:
-15x + 10y = - 50
15x - 18y = 66
==================
-8y = 16
y = 16/-8
y = -2
Sustituimos el valor obtenido de y en la segunda ecuación inicial
5x - 6y = 22
5x - 6(-2) = 22
5x + 12 = 22
5x = 22 - 12
5x = 10
x = 10/5
x = 2
RTA:
x = 2
y = -2