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+14538 #1
+14538 Zinsformel für Monate : $${\mathtt{Z}} = {\frac{{\mathtt{K}}{\mathtt{\,\times\,}}{\mathtt{m}}{\mathtt{\,\times\,}}{\mathtt{p}}}{\left({\mathtt{100}}{\mathtt{\,\times\,}}{\mathtt{12}}\right)}}$$
(einfache Zinsrechnung)
K= 1275 € ; m = 8 Monate ; p = 13,6 %
Z = $${\frac{{\mathtt{1\,275}}{\mathtt{\,\times\,}}{\mathtt{8}}{\mathtt{\,\times\,}}{\mathtt{13.6}}}{{\mathtt{1\,200}}}} = {\frac{{\mathtt{578}}}{{\mathtt{5}}}} = {\mathtt{115.6}}$$
Die Zinsen betragen 115,60 € .
Für die Jahre musst du 8/12 = 0,6666666 eintragen !
Gruß radix
!
#1
+14538 2*(x+3) - 3*(x+1) = 9
2x + 6 - 3x - 3 = 9
-x +3 = 9 => -x = 6 => x = 6
Test: $${\mathtt{2}}{\mathtt{\,\times\,}}\left({\mathtt{\,-\,}}{\mathtt{6}}{\mathtt{\,\small\textbf+\,}}{\mathtt{3}}\right){\mathtt{\,-\,}}{\mathtt{3}}{\mathtt{\,\times\,}}\left({\mathtt{\,-\,}}{\mathtt{6}}{\mathtt{\,\small\textbf+\,}}{\mathtt{1}}\right) = {\mathtt{9}}$$
Gruß radix
!