Question 1082665
x+y+z=12
x-y+z=6
x-y-z=o. 
So x,y,and,z=?
<pre>x + y + z = 12 ----- eq (i)
x - y + z = 6 ------ eq (ii)
x - y - z = 0 ------ eq (iii)
<b>1) ADD eqs (i) & (iii) to ELIMINATE y and z and find the value of x
2) Subtract eq (ii) from eq (i), or vice-versa to ELIMINATE x and z and find the value of y
3) Subtract eq (iii) from eq (ii) or vice-versa to ELIMINATE x and y and determine the value of z.</b>