rozwiaz uklady rownan a) x =y 5x - y = 4 B) y = 2x +1 4x + y = 13 c) 5y - x = 3 x = 3-y

a) x=y 5x-y=4 x=y 5*y - y=4 x=y 4y=4 /:4 x=y y=1 x=1 b) y=2x+1 4x+y=13 y=2x+1 4x+2x+1=13 y=2x+1 6x+1=13 y=2x+1 6x=13-1 y=2x+1 6x=12 /:6 y=2x+1 x=2 y=2*2+1 x=2 y=5 c) 5y-x=3 x=3-y 5y-3-y=3 x=3-y 4y-3=3 x=3-y 4y=3+3 x=3-y 4y=6 /:4 x=3-y y=1,5 x=3-1,5 y=1,5 x=1,5