( {2x-y=1
( {3x+2y=7

\left \{ {{y=2x-1} \atop {3x+4x-2=7}} ight.  \left \{ {{y=2x-1} \atop {7x=9}} ight.  \left \{ {{y= \frac{18}{7}-1= \frac{11}{7}  } \atop {x =\frac{9}{7}}} ight.Ответ: x= 9/7, y=11/7