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1) y= 23 -6x
2) y = 3x-23 /2
Igualamos:
23-6x = 3x -23 /2
46 -12x = 3x -23
46+23 = 15x
69/15 =x
23/5 =x
Luego reemplazamos x en y= 23-6x
y = 23 -(6×23/5)
y = 23 - 7/5
y= 108/5