September 2018 1 28 Report

rozwiąż układy równań sposobem dodawania stronami :

a) -3x+y=-30

3x+2y=21

b) 4x-7y=3

3x+14y=5

c) 12x-5=-19

6x+10y=-22

d) 10x+21y=-9

-5x=7y=8

prosze o pomoc ! :)


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