September 2018 1 20 Report

rozwiązać równania:

proszę mam tylko 27 punktów.

1. y-x=4

3(x+y)=24

2. x-2y=4

x+3=2y

3. 3x-1=y-2

4x-3=-2(y-2)

4. 2(x+y)-(x-1)=y+2

x+y=1


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