September 2018 1 11 Report

Rozwiąż metoda podstawiania


a)
2y - 5x = 6
-x = -y + 6

b)
2x - 5(y + 1) = - 5
- x + 2(y + 2) = 4

c)
2y - (3+y) = 0
-x + y / 2 = 2


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