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Answer 1 · 2017-08-11T09:34:12

$x=-9$

$x+2=3-10$
$x+2=-7$
$x+2=-7-2$
$x=-9$

Answer 2 · 2017-08-11T10:04:15

$x = -9$

From your given question..

If $x + 2 = 3 - 10$

$color(white)(x) x + 2 = -7$

collect like terms..

$color(white)(x) x = -7 - 2$

$color(white)(x) x = -9$

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