Question 929970
a(1,2,3)+b(2,3,1)=(2,4,5)
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1.{{{a+2b=2}}}
2.{{{2a+3b=4}}}
3.{{{3a+b=5}}}
There is no solution for these three equations in two unknowns. 
No, it is not possible to form w as a linear combination of u and v.