n = numarul
[tex]\frac{^{4)}2}{3}\cdot{n}+\frac{^{3)}1}{4}\cdot{n}=^{12)}99\\
8n+3n=12\cdot99\\
11\cdot{n}=12\cdot99\;|_{:11}\\
n=12\cdot9=108\;.[/tex]
[tex]Verificare:\;\\
\frac{2}{3}\cdot108=72\;\;si\;\;\frac{1}{4}\cdot108=27\;;\\
72+27=99 ...
[/tex]
pt. deschiderea imaginii apasa tasta F5 1
