# More variables than equations

Algebra Level pending

Let $$r =\dfrac{s}{2}$$, $$s=7t$$, $$t=2u$$, $$u=3v$$, $$v= 4w$$, $$w=10z$$ and $$z\neq 0$$.

Find the value of $$\dfrac{r+s+t+u+v+w}{z^{3}}$$.

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