Z.1 Rozwiąż układy równań metodą przeciwnych współczynników a)2x + 5y = 7 3x - 5y = 3
2x + 5y = 7
3x - 5y = 3
---------------
5x = 10 | :5
x = 2
2*2 + 5y = 7
4 + 5y = 7
7 - 4 = 5y
3 = 5y | :5
3/5 = y
y = 0,6
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2x + 5y = 7
3x - 5y = 3
---------------
5x = 10 | :5
x = 2
2x + 5y = 7
2*2 + 5y = 7
4 + 5y = 7
7 - 4 = 5y
3 = 5y | :5
3/5 = y
y = 0,6