$$\frac{ 6 }{ x+y } = \frac{ 7 }{ x-y } +3, \frac{ 1 }{ 2(x+y) } = \frac{ 1 }{ 3(x-y) }$$
$x = -\frac{5}{4} = -1\frac{1}{4} = -1.25$
$y=-\frac{1}{4}=-0.25$
