Odpowiedzi

Najlepsza Odpowiedź!
2009-12-10T16:04:52+01:00
3x-2y 5x-3y
₋₋₋₋₋₋₋₋ + ₋₋₋₋₋₋₋₋ = x+1 /*15
5 3

2x - 3y 4x - 3y
₋₋₋₋₋₋₋₋ + ₋₋₋₋₋₋₋₋₋₋ = y+1 /*6
3 2


3(3x-2y)+5(5x-3y)=15x+15
2(2x-3y)+3(4x - 3y)=6y+6

9x-6y+25x-15y=15x+15
4x-6y+12x-9y=6y+6

19x-21y=15
16x-21y=6 /*(-1)

19x-21y=15
-16x+21y=-6
------------- dodajemy
3x=9
x=3

16x-21y=6
-21y=-16x+6 /*(-1)
21y=16x-6
y=16/21x-6/21
y=16/21*3-6/21
y=16/7-6/21
y=2