Rozwiąż układy równań: a) 4y-x=6 17y=0 b) a=b 2a+b=9 c) u=4v 5u-v=10 d) 3r=s 3r+s=24

a) 4y - x = 6 17y = 0 /:17 4y - x = 6 y = 0 4 * 0 - x = 6 y = 0 -x = 6/: (-1) y = 0 x = -6 b) a = b 2a + b = 9 a = b 2b + b = 9 a = b 3b = 9 /: 3 a=b b = 3 a = 3 c) u = 4v 5u - v = 10 u = 4v 20v - v = 10 u = 4v 19v = 10/ :19 u = 4v v = 1,9 u = 7,6 d) 3r = s 3r + s = 24 3r = s 3r + 3r = 24 3r = s 6r = 24/:6 3r = s r = 4 s = 12

a) 4y-x=6 17y=0 4y - x = 6 17y = 0 /:17 4y - x = 6 y = 0 4 * 0 - x = 6 y=0 y = 0 -x = 6/: (-1) y = 0 x = -6 b) a=b 2a+b=9 a-b=0/*(-2) 2a+b=9 -2a+2b=0 2a+b=9 __________ 3b=9/:3 b=3 a-b=0 a-3=0 a=3 a=3 b=3 c) u=4v 5u-v=10 u=4v 5(4v)-v=10 u=4v 20v-v=10 u=4v 19v=10/:19 u=4v v= 10/19 u=4* 10/19 v=10/19 u=40/19 v=10/19 u= 2 2/19 v=10/19 d) 3r=s 3r+s=24 s=3r 3r+3r=24 s=3r 6r=24/:6 s=3r r=4 s=3x4 r=4 s=12 r=4