Question 839299
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Hi,
Let x, y, z  represent the numbers respectively
The sum of 3 numbers is 2.
the first number minus the second plus the third is -2.
The first minus the third is 2 more than the second. 
Write as we read
I.   x + y + z = 2
II.  x - y + z = -2
III. x - z = y + 2

I.  x + y + z = 2
II. x - y + z = -2
  2x + 2z = 0  0r   {{{x = -z}}}

III.  x - z = y + 2
     -z - z = y + 2
{{{-2z - 2 = y }}}

I. -z + (-2z-2)  + z = 2
  -2z - 2 = 2
    -2z = 4
      z = -2
 x = 2,  y = 2, z = -2