October 2018 1 39 Report

metoda podstawiania. 3 przykłady na jutro!!

1. 3(x-1)+2(2-y)= -5-y

x+y=2

2. 1/2x+1/4y =1/2

x+1/4y=-1

3. 2x-4/3 y=-3

x+1/2y=2


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