December 2018 1 7 Report
1.Rozwiąż metodą podstawiania poniższe układy równań:


a) 5x + 2y = 2,7
x + 5y = 1
b) 2x + y = 2 1/2
3x + 4y = 5
c) 1/2 x - 1/4 y = 4
2/3 x + 1/2 y = 2
d) 2x + 4y = -7
4x - 3y = 8
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