Question

Rezolvati sistemul: x+y-9(totul supra) x-2y=3/4
x+y-1(totul supra) 4-3x-2y-6(totul supra)6=-25/12

Ajutorrr!!!!

Answer 1

(x+y-9)/(x-2y)=3/4 (x+y-1)/4-(3x-2y-6)/6=-25/12
4x+4y-36=3x-6y3x+3y-3-6x+4y+12=-25
x+10y-36=0
-3x+7y+34=0
x=36-10y
-3(36-10y)+7y-34=0
-108+30y+7y-34=0
37y=74
y=2
x=36-10×2=36-20=16

x=16
y=2