September 2018 1 13 Report

Rozwiąż układy równań. Metoda podstawiania.

1. 1/2x - 2/3y =4

1cała i 1/2x +y=3

2. 3x+2y=-7

-2x+3y=9

3. 2x-4y=20

1/3x+1/9y=2/9


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