September 2018 2 21 Report

rozwiąż układy równań mtodą podstawiania :

1) 2x- 3y = -5
-x + 5y + 6

2) 3x- 3y +4 = 0
x + 1/2y - 2 = 0

3) 4x -2y= 6
3x + 6y= 12

4) 3x -4y = 14
-2x + 7y = -18


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