{-2x-11y = 73 3x-4y=47

2x-11y=73 /*(-3) 3x-4y=47 /*2 -6x+33y=-219 6x-8y=94 --------------- 25y=-125 /:25 y=-5 3x=47+4y 3x=47+4(-5)=47-20=27 /:3 x=9 x=9 y=-5 licze na naj (;