Question #b663b

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Answer 1 · 2017-06-30T03:09:01

$x=-0.2$
$y=0.6$

write the equations one over another and add

$x+y=0.4$
$x-y=-0.8$

adding you get: $2x=-0.4$

divide both sides by 2: $x=-0.2$

Substitute into one of the equations to find $y$

$-0.2+y=0.4$

$y=0.6$