Odpowiedzi

2010-02-27T16:39:11+01:00
×1. 3s + 5u + 5t + 4v = 0

2. 3x - y = 5 /×(-2)
5x - 2y = 7

X=3
Y=4

3. x-3y=5 /×(-3)
y+3x=-5

y = -2
x = -1

4. 2x-3y=7 /× (-3)
3x-5y=11/×2

y = -1
x = 2

5. 5p-2r=211/×(-3)
3p+5r=-6/×5

31r = -663 ??? r = -21.387...

6.
2x-3y=10 /×(-5)
5x+5y=0 /×2