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Question 1. Determine the vector x   which satisfies the equality 12a-2x=b-5x,   where a=(2,-6),   b=(4,-9).  
a) x=(-1,2)  
b) x=(1,-2)  
c) x=(1,4)  
d) x=(-1,-4)  
e) x=(1,-1)  
Question 2. Determine the straight line which passes through the point [2,1]   and the intersection of lines 2x-y+5=0   and x=1+3t,   y=-t,   t.  
a) y-1=0  
b) 3x+y-7=0  
c) does not exist.
d) 3x-y+5=0  
e) -x-2y+4=0  
Question 3. The distance of the point A=[3,1,0]   from the plane x+2y+z-1=0  is equal to
a) 756  
b) 236  
c) 156  
d) 536  
e) 736  

Evaluate