Rozwiąż układy rownań metodą podstawiania a) 4y-x=6 17y=0 x=-6 y=0 b) a=b 2a+b=9 a=3 b=3 c) u=4v 5u-v=10 w ułamku u=40/19 v=10/19 d) 3r=s 3r+s=24 r=4 s=12 prosze o działania

a) 4y-x=6 x=-6 17y=0 y=0 ROZWIAZANIE: 4y-x=6 x=6 4y-6=6 x=6 4y=6+6 x=6 4y=12/4 x=6 y=3 x=6 17y=0 y=0 17*0=0 y=0 0=0 y=0

a) 4y-x=6 /*(-1) x=-6 17y=0 y=0 -4y+x=-6 17y=0 x=-6+4y 17y=0 /:17 y=0 x=-6+0 y=0 x=-6 d) 3r=s r=4 3r+s=24 s=12 s=3r s+s=24 2s=24 /:2 s=3r s=12 3r=12/:3 s=12 r=4 b) a=b a=3 2a+b=9 b=3 2a+a=9 a=b 3a=9/:3 a=b a=3 b=3

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 y = 0 b) a=b 2a+b=9 a = b 2 * b + b = 9 a = b 2b + b = 9 a = b 3b = 9 / : 3 a = b b = 3 a = 3 b = 3 c) u=4v 5u-v=10 u = 4v 5 * (4v) - v = 10 u = 4v 20 v - 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 d) 3r = s 3r+s = 24 s = 3r s+s = 24 2s = 24 /:2 s = 3r s = 12 3r = 12/:3 s = 12 r = 4