(1/6z)÷3+(1/6z)=15

Hello Anonymous,

I hope it is right !

Gruß radix !

$${\frac{\left({\frac{{\mathtt{1}}}{{\mathtt{6}}}}{\mathtt{\,\times\,}}{\mathtt{z}}\right)}{{\mathtt{3}}}}{\mathtt{\,\small\textbf+\,}}\left({\frac{{\mathtt{1}}}{{\mathtt{6}}}}{\mathtt{\,\times\,}}{\mathtt{z}}\right) = {\mathtt{15}}$$           |  *3

$$\left({\frac{{\mathtt{1}}}{{\mathtt{6}}}}{\mathtt{\,\times\,}}{\mathtt{z}}\right){\mathtt{\,\small\textbf+\,}}{\mathtt{3}}{\mathtt{\,\times\,}}\left({\frac{{\mathtt{1}}}{{\mathtt{6}}}}{\mathtt{\,\times\,}}{\mathtt{z}}\right) = {\mathtt{45}}$$

$${\mathtt{4}}{\mathtt{\,\times\,}}\left({\frac{{\mathtt{1}}}{{\mathtt{6}}}}{\mathtt{\,\times\,}}{\mathtt{z}}\right) = {\mathtt{45}}$$               =>    $${\frac{{\mathtt{4}}{\mathtt{\,\times\,}}{\mathtt{z}}}{{\mathtt{6}}}} = {\mathtt{45}}$$      =>      $${\mathtt{z}} = {\frac{{\mathtt{45}}{\mathtt{\,\times\,}}{\mathtt{6}}}{{\mathtt{4}}}} \Rightarrow {\mathtt{z}} = {\mathtt{67.5}}$$