Rozwiąż układy równań a <3/5x + 1/2y = 2 <1/2 (2x-y) = 2 b < x+2/5 - 2y = 5 < x- y+2/6 = 3 2/3 - takie znaki to sa ulamki :) :D

a) 2,5-½y=2 ½(2x-y)=2 ->x-½y=2 ⅗x+½y=2 x-½y=2 1⅗x=4/:1⅗ x=2,5 2,5-½y=2 -½y=2-2,5 -½y=-0,5/*(-2) y=1 b < x+2/5 - 2y = 5 +< x- y+2/6 = 3 =>x=3+y+2/6 (3+y+2/6)+2/5-2y=5 5 2/6+2/5-1y=5 -y=-5-5 2/6+2/5 -y=2/6+2/5 2/6= 10/30 2/5= 12/30 10/30+12/30=22/30=11/15 -y=11/15/*(-1) y=-11/15 ;)