Question 1132567
-2x+5y-3z=7 (multiply by 2) -4x + 10y - 6z = 14
4x-3y+2z=4                   4x - 3y  + 2z   =4
-3x-y-4z=-7

-4x + 10y - 6z = 14
 4x - 3y  + 2z   =4  add

7y -4z = 18

y = 2
z = -1
x = 3