Question

x+2y+4z=0
2x+3y=0
x-14z=0

Answer 1

X+2y+4z=02x+3y=0
x-14z=0 ==> 14z = x ==> z = x/14

x + 2y + 4x/14 = 0 ==> 14x +2y + 4x = 0 ==> 18x + 2y = 0(:2)=> 9x + y = 0

2x + 3y =0
9x + y = 0(-3) 

2x + 3y =0
-27x -3y = 0 
   - 25x = 0 ==> x = 0

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9x + y = 0 ==> y = -9x ==> y = -9(0) ==> y = 0

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z =  x  ==> z =  0  ==> z = 0
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