$$\left. \begin{array} { l } { y + 10 x + 0 = 0 } \\ { + x + 10 x + 1 } \\ { + x + 10 + x + 1 } \end{array} \right.$$
$z=\frac{11a-119}{2}$
$$z=x+10x+1$$ $$y+10x+0=0$$ $$a=x+10+x+1$$
$$z=11x+1$$
$$y=-10x$$ $$x=-\frac{11}{2}+\frac{1}{2}a$$
$$y=-10\left(-\frac{11}{2}+\frac{1}{2}a\right)$$
$$y=55-5a$$
$$z=11\left(-\frac{11}{2}+\frac{1}{2}a\right)+1$$
$$z=\frac{11}{2}a-\frac{119}{2}$$
$$x=-\frac{11}{2}+\frac{1}{2}a$$ $$y=55-5a$$ $$z=\frac{11}{2}a-\frac{119}{2}$$
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