September 2018 1 14 Report

rozwiąż równania

pierwsze równanie

2(x+y)-(x-1)=y+2

x+y=1

drugie równanie

1/2(x-1)+y=-2 1/2

x-7=1-y

trzecie równanie

x-y -x+y

3 2 =-1/2

i czwarte równanie

(x-1)2 - (y+2)2 =(x-y) (x+y)

2x+y =0



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