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2)x-y=3
multiplicamos por '3 'a 2) para eliminar "y'
1)5x+3y=6
2)3x-3y= 9 ahora sumamos y restamos
5x+3x+3y-3y= 6+9
8x= 15
x= 15/8
reemplazamos " x" en 1)
1)5x+3y= 6
5(15/8)+3y= 6
(75/8)+3y= 6
3y= 6-(75/8)
3y=(6*8-75)/8
3y= (48-75)/8
3y= 27/8
y=(27/8)/(3/1)
y=(27*1)/(8*3)
y=27/24 sacamos tercia
y= 9/8
respuesta
x= 15/8
y=9/8
espero q sea d ayuda
1) 5x + 3y = 6 (1)
2) x - y = 3 (3)
5x + 3y = 6
3x - 3y = 9
-------------------
8x + 0y = 15
8x = 15
x = 15/8
El valor de x lo reemplazo en ecuación 1
5x + 3y = 6
5 (15/8) + 3y = 6
75/8 + 3y = 6
3y = 6 - 75/8
3y = (6 * 8 - 75)/8
3y = (48 - 75)/8
3y = - 27/8
y = - 27/8/3/1
y = - 27/24
y = - 9/8
Respuesta.
x = 15/8
y = - 9/8