Question 715196
x-2y+3z=11
4x+2y-3z=4
3x+3y-z=4
 Using equations 1 and 2, and 1 and 3, elimiate x first and solve.  

I can elimiate the x, but once i get to the equation
10y-15z=-40 --> 2y-3z = -8
9y-10z=-29
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2y - 3z = -8 times 9 --> 18y -27z = -72
9y -10z = -29 times 2 -->18y -20z = -58
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Subtract and you have z.
sub for z, find y
Sub for z & y to find x