October 2018 1 7 Report

Rozwiąż równanie metądą dowolną

a)

{7x+7y=21

{2x+5y+8=14

b)

{6x-9y=6

{8x+5y=7/3

c)

{5x-y=7

{2(x+1)=2y

d)

{x+y=5

{2x+2(y-4)=-4


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