a) x+3y=3 x-y=5 x+3y=3 x=5 + y 5+y + 3y=3 x=5 + y y+3y = -2 x=5 + y 4y=-2 x=5 + y y=-1/2 x=4 1/2 b) 2x-y=10 x+5y=17 x=17 - 5y 34-10y-y = 10 -11y = -24 y = 2 1/2 x= 4,5 c)3m+n=9 2m-5n=-11 n=9 - 3m 2m - 45 -15m = -11 -13m = 34 m=-2 8/13 n=16 11/13 d)4a-2=b 3a+7b=1,5 b= 4a - 2 3a + 28a -14 = 1,5 31a = 15,5 a=2 b=6 Pozdro
a)x+3y=3 x-y=5 x=-3y+3 -3y+3-y=5 -4y=-8/(-4) y=2 b) 2x-y=10 x+5y=17 x=17 - 5y 34-10y-y = 10 -11y = -24 y = 2 1/2 x= 4,5 c)3m+n=9 2m-5n=-11 n=9 - 3m 2m - 45 -15m = -11 -13m = 34 m=-2 8/13 n=16 11/13 d)4a-2=b 3a+7b=1,5 b= 4a - 2 3a + 28a -14 = 1,5 31a = 15,5 a=2 b=6 Prosze :D
