1) [tex]x+2 \frac{1}{7}=9=\ \textgreater \ x+ \frac{15}{7} =\ \textgreater \ x= \frac{9}{1} - \frac{15}{7}=\ \textgreater \ \frac{63-15}{7}=\ \textgreater \ x= \frac{48}{7} [/tex]
2) [tex]2x+ \frac{21}{5}=25=\ \textgreater \ 2x= \frac{125-21}{5} =\ \textgreater \ 2x= \frac{104}{5} =\ \textgreater \ x= \frac{104}{10}=\ \textgreater \ x= \frac{52}{5} [/tex]
Succes.
