Respostas

  • Usuário do Brainly
2014-02-22T14:32:03-03:00
2x=3y
x=3y/2
x=3(-6)/2
x=-9

y-2x=3
y-2(3y/2)=3
y-6y/4=3
4y-6y=12
-2y=12(-1)
y=-12/2
y=-6
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