[tex] \frac{2}{3} *x= \frac{y}{2} =\ \textgreater \ 4x=3y=\ \textgreater \ x= \frac{3y}{4}\\\\
x+y=105
\\
Inlocuim:\\
\\
\frac{3y}{4}+y=105 \\\\
3y+4y=420\\\\
7y=420\\\\
y= \frac{420}{7}\\\\
\bold{y=60} \\\\
x= \frac{3y}{4} \\\\
=\ \textgreater \ x= \frac{3*60}{4}\\\\
=\ \textgreater \ x= \frac{180}{4}\\\\
=\ \textgreater \ \bold{x=45} [/tex]
