Respostas
>>>3x-y=5
3x=5 -y=5.(-1)
x=5/3 y=-5
>>>>2x+3y=7
2x=7 3y=7
x=7/2 y=7/3
>>>>6x+5y=16 5y=16
6x=16 y=16/5
x=16/6 simplificando8/3
>>>5x-12y= -19
5x=-19
x=-19/5 -12y=-19
-y+-19/12.(-1) y=19/12
>>>>>3x-2y=7
3x=7 -2y=7
x=7/3 -y=7/2.(-1)
y=7/2
>>>>6x-4y=5
6x=5 -4y=5
x=5/6 -y=5/4.(-1)
y=-5/4