Odpowiedzi

Najlepsza Odpowiedź!
2010-02-09T22:15:19+01:00
{ 6x+7y =54|*6
{7x+6y =50|*(-7)

36x+42y=324
-49x-42y=-350
-13x=-26
x=2

6*2+7y=54
7y=42
y=6

1 5 1
2010-02-09T22:18:17+01:00
-x + y = 4
y = 4 + x

6x +7 (4+x) = 54
6x + 28 + 7x = 54
13x = 54 - 28
13x = 26
x = 2

6x + 7y = 54
6 * 2 + 7y = 54
12 + 7y = 54
7y = 54 - 12
7y = 42
y =6

x=2
y=6
1 5 1