Răspuns:
Explicație pas cu pas:
3(3x-2)-5y+6=17
5x-2(2y+3)+8=9
9x-6-5y+6=17
5x-4y-6+8=9
9x-5y=17
5x-4y+2=9
9x-5y=17 /*(-4)
5x-4y=7 /*5
-36x+20y=-68
25x-20y=35
-------------------------------------------+ adunam cele 2 relatii
-36x+25x=-68+35
-11x=-33 /:(-11)
x=3
inlocuim x in relatia
5x-4y=7
15-4y=7
4y=15-7
4y=8
y=2
