October 2018 2 22 Report

Rozwiąż układy równań:

1. 2(x-y)+3(x+y)=13

2x-3y=-5

2. 3(x-y)+2(x+y)=7

2x-3y=-5

3. 4(x-y)+3(x+y)=13

2x-3y=1

4. 3(x-y)+4(x+y)=15

-2x+3y=-1


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