August 2018 1 8 Report
2zadanie . Rozwiąż układy równań metodą przeciwnych współczynników .

a) x+2y=9
4x-2y= -4

b) -2x-y = 6
2x-5y= 6

c) 5x+2y = 12
2x+5y = 9

d) x+4y = 12
4x+y = 18

e) x-2y = -14
2x-y= -10

f) 2x+5y = -6
7x+4y = -21

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