Respuesta :

konrad509
[tex]6x = 90 +3y\\ x - 3y = 50\\\\ -6x+3y=-90\\ \underline{x-3y=50}\\ -5x=-40\\ x=8\\\\ 8-3y=50\\ 3y=-42\\ y=-14 [/tex]
I did it using elimination method.
Ver imagen fakeclogg