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rozwiaz przyklady metoda przeciwnych wspolczynnikow

1.
2x - y = 3
x+2y= -6

2.
3x-4y = 6
-x + 2y = -2

3.
x+y=9
x-y=1

4.
3a+4b=5
2a-3= - 11/12

5.
10x+5y= -5
13x+4y=1

6.
2x-y=6
2x+3y=14

7.
2x-3y= 6
x+y= -3

8.
2x+3y= -5
3x+4y= -6

9.
7x+8y=3
8x-5y= -39

10.
3x+2y=2
2x-3y=10

11.
x+2y/4 - 2x-y/2 = 1/4
x-y/3 - x+y/6 = - 1/3



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