Odpowiedzi

2009-12-10T18:49:07+01:00
6x+2y=7
9x-4y=0

12x+4y=14
9x-4y=0

3x=14
x=14/3

6(14/3) + 2y=7
28+2y=7
2y=-21
y=-21/2

x=14/3
y=-21/2
2009-12-10T18:49:46+01:00
6x+2y=7
9x-4y=0

6x=7-2y
1,5(7-2y)-4y=0

6x=7-2y
10,5-3y-4y=0

6x=7-2y
10,5=7y |:7

y=1,5
x=(7-3):6=4:6=2/3
1 5 1
2009-12-10T18:50:42+01:00
6x+2y=7/*2
9x-4y=0

12x+4y=14
9x-4y=0

12x+4y+9x-4y=14

21x=14

x=14/21

x=2/3

9x-4y=0
9*2/3-4y=0
6-4y=0
4y=6
y=6/4
y=3/2