3x=2,(4)y 2,(4)=(24-2)/9=22/9
3x=22y/9
y=27x/22
(x+y)/2=263
x+y=263*2
x+y=526
x+27x/22=526
22x+27x=11572
49x=11572
x=11572/49
y=27/22 × 11572/49 =14202/49
verificare
3* 11572/49=34716/49
2,(4)×14202/49 =22/9 ×14202/49=34716/49
[11572/49+14202/49]/2=25774/98=263
