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x2+y3=4
12x+13y+−13y=4+−13y12x=−13y+4
12x12=−13y+412Respuesta: x=−23y+8
Ejercicio -.2
x3+y=1
13x+y+−y=1+−y13x=−y+1
13x13=−y+113Respuesta : x=−3y+3