Question

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

Answer 1

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