hello friends

cone can help these problems

1)Given $\displaystyle V=(x,y,z)\in{R}^3/2x-y+5z=0$. Find a line L $\displaystyle / V+L=R^3$

2)$\displaystyle L=r(1,-1,1) / r \in R$.

Find 2 straight $\displaystyle L_1$ y $\displaystyle L_2$ in $\displaystyle R^3$ such that $\displaystyle L+L_1+L_2=R^3$

THANKS IN ADVANCE