Odpowiedzi

2009-12-17T13:06:01+01:00
5x-4y=11
7y-12x=-29

35x-28y=77
28y-48x=-116

-13x=-39

x=3
y=1
  • Użytkownik Zadane
2009-12-17T13:07:16+01:00
60x-48y=132
35y-60x=-145

-48y+35y=-145+132
-13y=-13
y=1
5x-4*1=11
5x-4=11
5x=15
x=3

x=3
y=1
2009-12-17T13:16:03+01:00
5x-4y=11
7y-12x=-29
5x-4y=11 /×12
-12x+7y=-29 /×5
60x-48y=132
-60x+35y=-145
-13y=-13 / :(-13)
y= 1

60x-48y= 132
60x=132+48y
60x=132+48
60x=180 /:60
x=3

spr.
5×3-4= 11
15-4= 11