Question

ajuuuuutoooooooooooooor!!! unul reducere unul substitutie

Answer 1

4(x+3)=3(x-y)=23

-2(x+y-2)+5(y-1)=4

4x+12-3x+3y=23

-2x-y+4+5y-5=4

x+3y=11

4y-2x=5

prin substitutie

x+3y=11 ⇒ x=11-3y

4y-2(11-3y)=5

4y-22+6y=5

10y=27

y=27/10

x=11-3y=11-3×(11/10)

x=29/10

deci x=29/10 si y=27/10