October 2018 1 20 Report

Rozwiąż równania :
1.6y-5+4y-19=25
2.7a-2-3a+6=4
3. 9x(6-2)+21=3 x - mnożenie
4.2x-7+5x-14=35 x - niewiadoma

Bardzo was proszę pomożcie


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