Finding linear combinations of the basis

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What would be the easiest way to express the vectors of the canonical basis $(e_1,e_2,e_3)\in \mathbb R ^3$ as a linear combinations of the vectors $v_1=(1,1,0), v_2=(-1,0,2),v_3=(1,1,1)$? And how can you find that? I've only managed to see that $e_3=v_3-v_1$.