Hi, das ist viel Tipperei:
$${\frac{\left({\frac{{\mathtt{a}}}{{\mathtt{x}}}}\right)}{\left({\frac{{\mathtt{a}}}{{\mathtt{x}}}}{\mathtt{\,\small\textbf+\,}}{\frac{{\mathtt{b}}}{{\mathtt{c}}}}\right)}} = {\frac{{\mathtt{d}}}{{\mathtt{p}}}}$$ über Kreuz multiplizieren
$${\frac{{\mathtt{a}}{\mathtt{\,\times\,}}{\mathtt{p}}}{{\mathtt{x}}}} = {\frac{{\mathtt{d}}{\mathtt{\,\times\,}}{\mathtt{a}}}{{\mathtt{x}}}}{\mathtt{\,\small\textbf+\,}}{\frac{{\mathtt{b}}{\mathtt{\,\times\,}}{\mathtt{d}}}{{\mathtt{c}}}} \Rightarrow {\mathtt{a}} = {\frac{{\mathtt{b}}{\mathtt{\,\times\,}}{\mathtt{d}}{\mathtt{\,\times\,}}{\mathtt{x}}}{\left({\mathtt{c}}{\mathtt{\,\times\,}}{\mathtt{p}}{\mathtt{\,-\,}}{\mathtt{c}}{\mathtt{\,\times\,}}{\mathtt{d}}\right)}}$$
$${\frac{{\mathtt{a}}{\mathtt{\,\times\,}}{\mathtt{p}}}{{\mathtt{x}}}}{\mathtt{\,-\,}}{\frac{{\mathtt{a}}{\mathtt{\,\times\,}}{\mathtt{d}}}{{\mathtt{x}}}} = {\frac{{\mathtt{b}}{\mathtt{\,\times\,}}{\mathtt{d}}}{{\mathtt{c}}}} \Rightarrow {\mathtt{a}} = {\frac{{\mathtt{b}}{\mathtt{\,\times\,}}{\mathtt{d}}{\mathtt{\,\times\,}}{\mathtt{x}}}{\left({\mathtt{c}}{\mathtt{\,\times\,}}{\mathtt{p}}{\mathtt{\,-\,}}{\mathtt{c}}{\mathtt{\,\times\,}}{\mathtt{d}}\right)}}$$ Gl. mit x multipl.
$${\mathtt{a}}{\mathtt{\,\times\,}}{\mathtt{p}}{\mathtt{\,-\,}}{\mathtt{a}}{\mathtt{\,\times\,}}{\mathtt{d}} = {\frac{{\mathtt{b}}{\mathtt{\,\times\,}}{\mathtt{d}}{\mathtt{\,\times\,}}{\mathtt{x}}}{{\mathtt{c}}}} \Rightarrow {\mathtt{a}} = {\frac{{\mathtt{b}}{\mathtt{\,\times\,}}{\mathtt{d}}{\mathtt{\,\times\,}}{\mathtt{x}}}{\left({\mathtt{c}}{\mathtt{\,\times\,}}{\mathtt{p}}{\mathtt{\,-\,}}{\mathtt{c}}{\mathtt{\,\times\,}}{\mathtt{d}}\right)}}$$
$${\mathtt{x}} = {\frac{{\mathtt{a}}{\mathtt{\,\times\,}}{\mathtt{c}}{\mathtt{\,\times\,}}\left({\mathtt{p}}{\mathtt{\,-\,}}{\mathtt{d}}\right)}{\left({\mathtt{b}}{\mathtt{\,\times\,}}{\mathtt{d}}\right)}} \Rightarrow {\mathtt{x}} = {\frac{\left(\underset{{\tiny{\text{Error: Unbekannte Variable}}}}{{\mathtt{a}}}\right){\mathtt{\,\times\,}}\left(\underset{{\tiny{\text{Error: Unbekannte Variable}}}}{{\mathtt{c}}}\right){\mathtt{\,\times\,}}\left(\underset{{\tiny{\text{Error: Unbekannte Variable}}}}{{\mathtt{p}}}\right){\mathtt{\,\small\textbf+\,}}\left(\underset{{\tiny{\text{Error: Unbekannte Variable}}}}{{\mathtt{a}}}\right){\mathtt{\,\times\,}}\left(\underset{{\tiny{\text{Error: Unbekannte Variable}}}}{{\mathtt{c}}}\right){\mathtt{\,\times\,}}\left({\mathtt{\,-\,}}\underset{{\tiny{\text{Error: Unbekannte Variable}}}}{{\mathtt{d}}}\right)}{\left(\underset{{\tiny{\text{Error: Unbekannte Variable}}}}{{\mathtt{b}}}\right){\mathtt{\,\times\,}}\left(\underset{{\tiny{\text{Error: Unbekannte Variable}}}}{{\mathtt{d}}}\right)}}$$
x = (a*c*p/a*c*d) / b*d
Alles was nach dem Pfeil => kommt, musst du vergessen !
Besser kann ich es leider nicht schreiben ! Gruß radix !